Suchergebnisse

Journal of High Energy Physics 2013.12 (2013): 039 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA) ; A study of proton-proton collisions in which two b hadrons are produced in association with a Z boson is reported. The collisions were recorded at a centre-of-mass energy of 7TeV with the CMS detector at the LHC, for an integrated luminosity of 5:2 fb-1. The b hadrons are identified by means of displaced secondary vertices, without the use of reconstructed jets, permitting the study of b-hadron pair production at small angular separation. Differential cross sections are presented as a function of the angular separation of the b hadrons and the Z boson. In addition, inclusive measurements are presented. For both the inclusive and differential studies, different ranges of Z boson momentum are considered, and each measurement is compared to the predictions from different event generators at leading-order and next-to-leading-order accuracy ; Individuals have received support from the Marie-Curie programme and the European Research Council and EPLANET (European Union); the Leventis Foundation; the A. P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy O ce; the Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the Ministry of Education, Youth and Sports (MEYS) of Czech Republic; the Council of Science and Industrial Research, India; the Compagnia di San Paolo (Torino); the HOMING PLUS programme of Foundation for Polish Science, conanced by EU, Regional Development Fund; and the Thalis and Aristeia programmes nanced by EU-ESF and the Greek NSRF

In response to the 2013 Update of the European Strategy for Particle Physics, the Future Circular Collider (FCC) study was launched, as an international collaboration hosted by CERN. This study covers a highest-luminosity high-energy lepton collider (FCC-ee) and an energy-frontier hadron collider (FCC-hh), which could, successively, be installed in the same 100 km tunnel. The scientific capabilities of the integrated FCC programme would serve the worldwide community throughout the 21st century. The FCC study also investigates an LHC energy upgrade, using FCC-hh technology. This document constitutes the second volume of the FCC Conceptual Design Report, devoted to the electron-positron collider FCC-ee. After summarizing the physics discovery opportunities, it presents the accelerator design, performance reach, a staged operation scenario, the underlying technologies, civil engineering, technical infrastructure, and an implementation plan. FCC-ee can be built with today's technology. Most of the FCC-ee infrastructure could be reused for FCC-hh. Combining concepts from past and present lepton colliders and adding a few novel elements, the FCC-ee design promises outstandingly high luminosity. This will make the FCC-ee a unique precision instrument to study the heaviest known particles (Z, W and H bosons and the top quark), offering great direct and indirect sensitivity to new physics. © 2019, The Author(s). ; Istanbul Üniversitesi: 3 Istituto Nazionale di Fisica Nucleare Joint Institute for Nuclear Research Istituto Nazionale di Fisica Nucleare CNRS/IN2P3/UPSUD/ LAL University of Oxford INFN CT Kyoto University Kennesaw State University Kangnung National University Joint Institute for Nuclear Research Korea Institute of Toxicology King's College London Islamic Azad University Fondation Louvain CA Chinese Academy of Agricultural Sciences 2 Instituto Nazionale di Fisica Nucleare Kyungpook National University Universidad de Guanajuato High Magnetic Field Laboratory, Chinese Academy of Sciences Nuclear Physics Shenyang Normal University Princeton University, Princeton Stony Brook University: TU Darmstadt University of Tokyo Monash University National and Kapodistrian University of Athens Peking University Trinity College Dublin University of Pittsburgh, Pitt Tsinghua University Universidade do Estado do Rio de Janeiro ES National Research Nuclear University MEPhI Institute for Research in Fundamental Sciences Tel Aviv University Princeton University, Princeton United States Pharmacopeia Tokyo Institute of Technology University of Delhi Tokyo Institute of Technology Technische Universität Dresden: TU Dresden Dalian Institute of Chemical Physics National Rehabilitation Center National Research Center "Kurchatov Institute" Loughborough University Eidgenössische Technische Hochschule Zürich: RWTH Royal Holloway, University of London Trinity College Dublin Scuola Internazionale Superiore di Studi Avanzati Technische Universitat Wien, TU Wien Universidade do Estado do Rio de Janeiro Massachusetts Institute of Technology: MIT Mount Allison University Novosibirsk State Technical University Technische Universität Berlin Pusan National University University of Glasgow National Intelligence University Northwestern University Shahid Beheshti University of Medical Sciences Rutgers, The State University of New Jersey: UNIROMA1 Kingston Technology Nankai University Pennsylvania State University: PSU Royal Holloway, University of London Stanford University Bauman Moscow State Technical University: MSU Florida State University Institute for Research in Fundamental Sciences Lawrence Berkeley National Laboratory, Berkeley Lab Shanghai Jiao Tong University PSI SLAC Natural History Museum University of Chicago University of Cincinnati University of Illinois University of Birmingham University of Cambridge University of California, San Diego University of California, Santa Barbara University of California, Santa Cruz University of Florida City, University of London, City University of California: UCI UCB University College Dublin University of Bristol Health Effects Institute University of California, Santa Barbara University of California, Santa Cruz Sapienza Università di Roma: UNIROMA1, UNIROMA2, UNIROMA3 University of Illinois at Urbana-Champaign Universidade Federal do Rio de Janeiro Departament d'Innovació, Universitats i Empresa, Generalitat de Catalunya: UCL, UC, TW, TU, UA University of California, Irvine: UCSD Università degli Studi di Firenze University of California Berkeley, UC Berkeley University of Arizona Secrétariat Général pour les Affaires Régionales, Etat en Région Aquitaine Secrétariat Général pour les Affaires Régionales, Etat en Région Aquitaine École Polytechnique Fédérale de Lausanne Bundesamt für Energie Seventh Framework Programme: 312453, EuCARD-2 777563, 730871, 654305 European Synchrotron Radiation Facility European Synchrotron Radiation Facility ; 111 Istanbul Aydin University (IAU), Istanbul, Turkey 112 Istanbul University (IÜ), Istanbul, Turkey 113 Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Salerno – Sezione di Napoli (INFN SA), Salerno, Italy 114Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso (INFN LNGS), Assergi (L'Aquila), Italy 115Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati (INFN LNF), Frascati, Italy 116Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro (INFN LNLN), Legnaro, Italy 117 Istituto Nazionale di Fisica Nucleare Sezione di Bari (INFN BA), Bari, Italy 118 Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (INFN BO), Bologna, Italy 119 Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari (INFN CA), Cagliari, Italy 120 Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN CT), Catania, Italy 121 Istituto Nazionale di Fisica Nucleare, Sezione di Cosenza (INFN CS), Cosenza, Italy 122 Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara (INFN FE), Ferrara, Italy 123 Istituto Nazionale di Fisica Nucleare, Sezione di Firenze (INFN FI), Florence, Italy 124 Istituto Nazionale di Fisica Nucleare, Sezione di Genova (INFN GE), Genoa, Italy 125 Istituto Nazionale di Fisica Nucleare, Sezione di Lecce (INFN LE), Lecce, Italy 126Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca (INFN MIB), Milan, Italy 127 Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN MI), Milan, Italy 128 Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (INFN NA), Naples, Italy 129 Istituto Nazionale di Fisica Nucleare, Sezione di Padova (INFN PD), Padua, Italy 130 Istituto Nazionale di Fisica Nucleare, Sezione di Pavia (INFN PV), Pavia, Italy 131 Istituto Nazionale di Fisica Nucleare, Sezione di Perugia (INFN PG), Perugia, Italy 132Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Università di Pisa (INFN PI), Pisa, Italy 133 Istituto Nazionale di Fisica Nucleare, Sezione di Roma 1 (INFN Roma 1), Rome, Italy 134Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata (INFN Roma 2), Rome, Italy 135 Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre (INFN Roma 3), Rome, Italy 136 Istituto Nazionale di Fisica Nucleare, Sezione di Torino (INFN TO), Turin, Italy 137 Istituto Nazionale di Fisica Nucleare, Sezione di Trieste (INFN TS), Trieste, Italy 138 ITER (ITER), Cadarache, France 139 Ivane Javakhishvili T'bilisi State University (TSU), T'bilisi, Georgia 140 Izmir University of Economics (IUE), Izmir, Turkey 141 Johannes-Gutenberg-Universität (JGU), Mainz, Germany 142 John Adams Institute for Accelerator Science, The Chancellor, Masters and Scholars of the University of Oxford (JAI), Oxford, UK 143 Joint Institute for Nuclear Research (JINR), Dubna, Russia 144 Julius-Maximilians-Universität Würzburg (UWUERZBURG), Würzburg, Germany 145 Kahramanmaras Sutcu Imam University (KSU), Kahramanmaras, Turkey 146 Karlsruher Institut für Technologie (KIT), Karlsruhe, Germany 147 Katholieke Universiteit Leuven Research & Development (LRD), Louvain, Belgium 148 Key Laboratory of Theoretical Physics, Chinese Academy of Science (SKLTP ITP CAS), Beijing, P.R. China 149 King's College London (KCL), London, UK 150 Kyoto University (Kyodai), Kyoto, Japan 151 Kyungpook National University (KNU), Sankyuk-dong, Republic of Korea 152Laboratoire d'Annecy-Le-Vieux de Physique des Particules (CNRS/IN2P3/LAPP), Annecy, France 153 Laboratoire de l'Accélérateur Linéaire, Universitéde Paris Sud (CNRS/IN2P3/UPSUD/ LAL), Orsay, France 154 Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Paris, France -- 155Laboratoire de Physique Subatomique et de Cosmologie Grenoble (LPSC), Grenoble, France 156Laboratoire de Physique Théorique et Hautes Energies (CNRS/Sorbonne/LPTHE), Paris, France 157 Laboratoire Leprince-Ringuet, Ecole Polytechnique (LLR), Palaiseau, France 158 Laboratório de Instrumentac¸ão e Física Experimental de Partículas (LIP), Lisbon, Portugal 159 Latitude Durable (LD), Geneva, Switzerland 160 Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA, USA 161 Linde Kryotechnik AG (Linde), Pfungen, Switzerland 162 Loughborough University (LBoro), Loughborough, UK 163 Ludwig Maximilians University of Munich (LMU), Munich, Germany 164 Luvata Pori Oy (Luvata), Pori, Finland 165 MAN Energy Solutions Schweiz AG (MAN ES), Zürich, Switzerland 166 Marian Smoluchowski Institute of Physics, Jagiellonian University (UJ), Kraków, Poland 167 Massachusetts Institute of Technology (MIT), Cambridge, MA, USA 168 Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany 169 Max-Planck-Institut für Physik (MPP), Munich, Germany 170 Ministère de l'Europe et des Affaires étrangères (MEAE), Paris, France 171 Monash University (Monash), Melbourne, Australia 172 MTA Wigner Research Centre for Physics (Wigner), Budapest, Hungary 173 Mustafa Kemal Üniversitesi (MKU), Hatay, Turkey 174 Nankai University (NKU), Tianjin, P.R. China 175 Nationaal instituut voor subatomaire fysica (NIKHEF), Amsterdam, The Netherlands 176 National Centre for Scientific Research Demokritos (NCSRD), Athens, Greece 177National High Magnetic Field Laboratory, Florida State University (MagLab), Tallahassee, FL, USA 178 National Institute of Chemical Physics and Biophysics (NICPB), Tallin, Estonia 179 National Research Center Kurchatov Institute (NRCKI), Moscow, Russia 180 National Research Nuclear University MEPhI (MEPhI), Moscow, Russia 181 National Science Centre Kharkov Institute of Physics and Technology (KIPT), Kharkov, Ukraine 182 National Technical University of Athens (NTUA), Athens, Greece 183 Naturhistorisches Museum Wien (NHM), Vienna, Austria 184 Niels Bohr Institute, Copenhagen University (NBI), Copenhagen, Denmark 185 Nigde Ömer Halisdemir University (OHU), Nigde, Turkey 186 Northern Illinois University (NIU), DeKalb, IL, USA 187 Northwestern University (NU), Evanston, IL, USA 188 Novosibirsk State University (NSU), Novosibirsk, Russia 189 Otto-von-Guericke-Universityät Magdeburg (OVGU), Magdeburg, Germany 190 Oxford University (UOXF), Oxford, UK 191 Paul Scherrer Institute (PSI), Villigen, Switzerland 192 Peking University (PU), Beijing, P.R. China 193 Perimeter Institute for Theoretical Physics (PI), Watterloo, Canada 194Petersburg Nuclear Physics Institute, NRC "Kurchatov Institute" (PNPI), Gatchina, Russia 195 Piri Reis University (PRU), Istanbul, Turkey 196Pittsburgh Particle physics, Astrophysics & Cosmology Center and Department of Physics & Astronomy, University of Pittsburgh (PITT PACC), Pittsburgh, PA, USA 197 Princeton University (PU), Princeton, NJ, USA 198PRISMA Cluster of Excellence, Inst. für Physik, Johannes-Gutenberg-Universität (PRISMA), Mainz, Germany 199 Pusan National University (PNU), Busan, Republic of Korea 200 Queen's University (Queens U), Kingston, Canada 201 RAMENTOR Oy (RAMENTOR), Tampere, Finland 202 Rheinisch-Westfälische Technische Hochschule Aachen (RWTH), Aachen, Germany 203 Riga Technical University (RTU), Riga, Latvia 204 Royal Holloway University (RHUL), London, UK 205 Ruder Boskovic Institute (RBI), Zagreb, Croatia 206 Ruprecht Karls Universität Heidelberg (RKU), Heidelberg, Germany 207 Rutgers, The State University of New Jersey (RU), Piscataway, NJ, USA 208 Sapienza Università di Roma (UNIROMA1), Rome, Italy 209School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran 210 School of Physics and Astronomy, University of Glasgow (SUPA), Glasgow, UK 211Science and Technology Facilities Council, Daresbury Laboratory (STFC DL), Warrington, UK 212Science and Technology Facilities Council, Appleton Laboratory (STFC RAL), Rutherford, Didcot, UK 213 scMetrology SARL (scMetrology), Geneva, Switzerland 214 Scuola Int. Superiore di Studi Avanzati di Trieste (SISSA), Trieste, Italy 215 Scuola Normale Superiore (SNS), Pisa, Italy 216 Seoul National University (SNU), Seoul, Republic of Korea 217 Sevaplan und Wurm Schweiz AG (WURM), Winterthur, Switzerland 218 Shahid Beheshti University (SBUT), Tehran, Iran 219 Shanghai Jiao Tong University (SJTU), Shanghai, P.R. China 220 Shirokuma GmbH (Shirokuma), Wetzikon, Switzerland 221Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University (SINP MSU), Moscow, Russia 222 Southern Federal University (SFU), Rostov-on-Don, Russia 223 Southern Methodist University (SMU), Dallas, TX, USA 224Sri Guru Tegh Bahadur Khalsa College, University of Delhi (SGTB Khalsa College), New Delhi, India 225 Stanford National Accelerator Center (SLAC), Menlo Park, CA, USA 226 Stanford University (SU), Stanford, CA, USA 227 Stony Brook University (SBU), Stony Brook, NY, USA 228 Technische Universität Darmstadt (TU Darmstadt), Darmstadt, Germany 229 Technische Universität Dortmund (TU Dortmund), Dortmund, Germany 230 Technische Universität Dresden (TU Dresden), Dresden, Germany 231 Technische Universität Graz (TU Graz), Graz, Austria 232 Technische Universität Wien (TU Wien), Vienna, Austria 233 Tel Aviv University (TAU), Tel Aviv, Israel 234 The Citadel, The Military College of South Carolina (Citadel), Charleston, SC, USA 235 The Pennsylvania State University (PSU), University Park, PA, USA 236 The University of Tokyo (Todai), Tokyo, Japan 237 Thomas Jefferson National Accelerator Facility (JLab), Newport News, VA, USA 238 TOBB University of Economics and Technology (TOBB ETU), Ankara, Turkey 239 Tokyo Institute of Technology (Tokyo Tech), Tokyo, Japan 240 Trinity College Dublin (TCD), Dublin, Ireland 241 Tri-University Meson Facility (TRIUMF), Vancouver, Canada 242 Tsinghua University (THU), Beijing, P.R. China 243 Tsung-Dao Lee Institute (TDLI), Shanghai, P.R. China 244 Uludag University (ULUÜ), Bursa, Turkey 245 Universidad Autónoma de Sinaloa (UAS), Culiacán, Mexico 246 Universidad de Guanajuato (UGTO), Guanajuato, Mexico 247 Universidad de La Laguna (ULL), La Laguna, Spain 248 Universidad de la República (Udelar), Montevideo, Uruguay 249 Universidad de los Andes (Uniandes), Bogotá, Colombia 250 Universidade de São Paulo (USP), São Paulo, Brazil 251 Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, Brazil -- 252 Universidade Federal de Pelotas (UFPel), Pelotas, Brazil 253 Universidade Federal de Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil 254Università degli Studi Roma Tre – Centro Ricerche Economiche e Sociali Manlio Rossi-Doria (EDIRC), Rome, Italy 255 Università della Calabria (UNICAL), Arcavacata, Italy 256 Università del Salento (UNISALENTO), Lecce, Italy 257 Università di Bari (UNIBA), Bari, Italy 258 Università di Bologna (UNIBO), Bologna, Italy 259 Università di Cagliari (UNICA), Cagliari, Italy 260 Università di Catania (UNICT), Catania, Italy 261 Università di Ferrara (UNIFE), Ferrara, Italy 262 Università di Firenze (UNIFI), Florence, Italy 263 Università di Genova (UNIGE), Genoa, Italy 264 Università di Insubria (UNINSUBRIA), Milan, Italy 265 Università di Lecce(UNILE), Lecce, Italy 266 Università di Milano (UNIMI), Milan, Italy 267 Università di Padova (UNIPD), Padua, Italy 268 Università di Parma (UNIPR), Parma, Italy 269 Università di Pavia (UNIPV), Pavia, Italy 270 Università di Perugia (UNIPG), Perugia, Italy 271 Università di Roma Sapienza (UNIROMA1), Rome, Italy 272 Università di Roma Tor Vergata (UNIROMA2), Rome, Italy 273 Università di Roma Tre (UNIROMA3), Rome, Italy 274 Università di Torino (UNITO), Turin, Italy 275 Università di Udine (UNIUD), Udine, Italy 276 Universität Hamburg (UHH), Hamburg, Germany 277 Universität Heidelberg (HEI), Heidelberg, Germany 278 Universitat Politecnica de Catalunya (UPC), Barcelona, Spain 279 Universität Siegen (U Siegen), Siegen, Germany 280 Universität Tübingen (TU), Tübingen, Germany 281 UniversitéClermont Auvergne (UCA), Aubière, France 282 UniversitéGrenoble Alpes (UGA), Grenoble, France 283 University College London (UCL), London, UK 284 University of Applied Sciences Technikum Wien (UAS TW), Vienna, Austria 285 University of Arizona (UA), Tucson, AZ, USA 286 University of Basel(UNIBAS), Basel, Switzerland 287 University of Belgrade (UB), Belgrade, Serbia 288 University of Bergen (UiB), Bergen, Norway 289 University of Bern (UNIBE), Bern, Switzerland 290 University of Birmingham (UBIRM), Birmingham, UK 291 University of Bristol (UOB), Bristol, UK 292 University of California Berkeley (UCB), Berkeley, CA, USA 293 Davis (UCD), University of California, Davis, CA, USA 294 Irvine (UCI), University of California, Irvine, CA, USA 295 San Diego (UCSD), University of California, San Diego, CA, USA 296 University of California Santa Barbara (UCSB), Santa Barbara, CA, USA 297 University of California Santa Cruz (UCSC), Santa Cruz, CA, USA 298 University of Cambridge (CAM), Cambridge, UK 299 University of Chicago (UCHI), Chicago, IL, USA 300 University of Cincinnati (UC), Cincinnati, OH, USA 301 University of Edinburgh (ED), Edinburgh, UK 302 University of Florida (UF), Gainesville, FL, USA 303 University of Geneva (UniGE), Geneva, Switzerland 304 University of Illinois at Urbana Champaign (UIUC), Urbana Champaign, IL, USA 305 University of Iowa (UIowa), Iowa City, IA, USA -- The Auvergne-Rhône-Alpes regional government is headed by a prefect who is supported by an office (Secrétariat Général de la Région Auvergne-Rhône-Alpes, SGAR) located in Lyon. Within this administration, the prefect is the representative of the French Republic. The SGAR and the prefect's office work together on all development activities in the area. In 2016 the SGAR launched an analysis so that the prefect, and in turn the French national administration, could be informed about a significant extension of CERN's infrastructure and to estimate the associated administrative and financial impacts for France. This activity led to the establishment of a series of regular meetings with CERN for the development of the preparatory phase. France promotes a "participative democracy" [549–551], calling for a process to find a consensus through open discussions amongst all stakeholders in the project from the conceptual stage onwards. The process starts with the development of the basic concept, a feasibility study concerning the infrastructural challenges, a proposal for the governance and funding and a socio-economic cost-benefit analysis. The infrastructural changes concern a wide range of topics: the use of excavation material, a concept for managing conventional waste during all project phases, an energy management plan that can be integrated with the territorial energy balance plan, plans for the consumption of resources such as water, proposals for synergies with the host state to contribute to the territorial development, the development of traffic and mobility concepts and further topics. CEREMA6, a public entity associated with the ministry of ecological transition and solidarity and the ministry of territorial cohesion, has produced a report for the SGAR and the prefect on the impact of an FCC for the host state concerning administrative processes and the associated financial engagements [552]. -- MVDC distribution systems are an active area of academic research that spans various sectors including electrical engineering, electronics, information and computing technologies, reliability engineering, functional safety, economics and business analysis. Consequently, this is an ideal application to bring academic partners with complementary competencies from different geographical regions together at CERN in a concrete technological research project with tangible impact potential at academic levels, with high-educational value and with opportunities to work in a close-to-market environment. Specifically, EPFL (Lausanne, Switzerland), a technical university, has an active programme on the development of MVDC power distribution networks with support from the Swiss Federal Office of Energy (SFOE). -- The research, which led to this publication has received funding from the European Union's Horizon 2020 research and innovation programme under the grant numbers 654305 (EuroCirCol), 764879 (EASITrain), 730871 (ARIES), 777563 (RI-Paths) and from FP7 under grant number 312453 (EuCARD-2). The information herein only reflects the views of its authors. The European Commission is not responsible for any use that may be made of the information. Trademark notice: All trademarks appearing in this report are acknowledged as such. -- Emittance The area in phase space occupied by a particle beam. The units are mm-milliradians for transverse emittance and eV·s for longitudinal emittance. EN European norms are documents that have been ratified by one of the three ESOs (European Standardisation Organisations), CEN, CENELEC or ETSI; recognised as competent in the area of voluntary technical standardisation as for the EU Regulation 1025/2012. EOT The most common type of overhead crane, found in many factories. These cranes are electrically operated by a control or remote control pendant, or from an operator cabin attached to the crane. EPFL The École polytechnique fédérale de Lausanne is one of the two Swiss Federal Institutes of Technology. EPPSU European Particle Physics Strategy Update. See also https:// europeanstrategy.cern. ERL Energy recovery Linac. ERMC Enhanced racetrack model coil. ES Electro static. ESD Electron-stimulated desorption. ESFRI European strategy forum for research infrastructures. Espoo Convention The Espoo Convention sets out the obligations of parties to assess the environmental impact of certain activities at an early stage of planning. It also lays down the general obligation of states to notify and consult each other on all major projects under consideration that are likely to have a significant adverse environmental impact across boundaries. ESPP European Strategy for Particle Physics. See also https:// europeanstrategy.cern. ESRF The European Synchrotron Radiation Facility is a joint research facility sit-uated in Grenoble, France, and supported by 22 countries (13 member coun-tries: France, Germany, Italy, UK, Spain, Switzerland, Belgium, The Netherlands, Denmark, Finland, Norway, Sweden, Russia and 9 associate countries: Austria, Portugal, Israel, Poland, Czech Republic, Hungary, Slovakia, India and South Africa). ESS Energy storage system. ETHZ The Eidgenössische Technische Hochschule Zürich is one of the two Swiss Federal Institutes of Technology. EU European Union. EuCARD2 A FP7 EC funded research and development project in the area of particle accelerator technologies. EuroCirCol A H2020 EC funded research and development project to develop the foundations of a future circular hadron collider. EW Electroweak. EWPO Electroweak precision observables. EWPT Electroweak phase transition. EWSB Electroweak symmetry breaking. EXP Experiment. Experiment insertion region Place in the particle collider hosting the interac-tion region in which the two beams are brought to collision and the surrounding particle physics experiments. EXT Extraction.

The invariance of the standard model (SM) under the CPT transformation predicts equality of particle and antiparticle masses. This prediction is tested by measuring the mass difference between the top quark and antiquark (?mt=mt-mt?) that are produced in pp collisions at a center-of-mass energy of 8 TeV, using events with a muon or an electron and at least four jets in the final state. The analysis is based on data corresponding to an integrated luminosity of 19.6 fb-1collected by the CMS experiment at the LHC, and yields a value of ?mt=-0.15±0.19(stat)±0.09(syst) GeV, which is consistent with the SM expectation. This result is significantly more precise than previously reported measurements. © 2017 The Author(s) ; European Regional Development Fund Ministry of Education and Science Welch Foundation: C-1845 Fundacja na rzecz Nauki Polskiej Thailand Korea Research Council for Industrial Science and Technology, ISTK Alfred P. Sloan Foundation Qatar National Research Fund Agentschap voor Innovatie door Wetenschap en Technologie Belgian Federal Science Policy Office Chulalongkorn University, CU Alexander von Humboldt-Stiftung European Commission Ministerstvo Školství, Mládeze a Telovychovy, Not Available A.G. Leventis Foundation Ministerstvo Školství, Mládeze a Telovychovy, Not Available 2012/07/E/ST2/01406, 2014/13/B/ST2/02543, 2014/14/M/ST2/00428, 2014/15/B/ST2/03998, 2013/11/B/ST2/04202 European Research Council ; Individuals have received support from the Marie-Curie programme and the European Research Council and EPLANET (European Union); the Leventis Foundation; the A. P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation ? la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Council of Science and Industrial Research, India; the HOMING PLUS programme of the Foundation for Polish Science, cofinanced from European Union, Regional Development Fund, the Mobility Plus programme of the Ministry of Science and Higher Education, the National Science Center (Poland), contracts Harmonia 2014/14/M/ST2/00428, Opus 2013/11/B/ST2/04202, 2014/13/B/ST2/02543 and 2014/15/B/ST2/03998, Sonata-bis 2012/07/E/ST2/01406; the Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF; the National Priorities Research Program by Qatar National Research Fund; the Programa Clar?n-COFUND del Principado de Asturias; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand); and the Welch Foundation, contract C-1845. --

The inclusive cross section for top-quark pair production measured by the CMS experiment in proton–proton collisions at a center-of-mass energy of 7 TeV is compared to the QCD prediction at next-to-next-to-leading order with various parton distribution functions to determine the top-quark pole mass, mt pole, or the strong coupling constant, ?S. With the parton distribution function set NNPDF2.3, a pole mass of 176.7-3.4 +3.8 GeV is obtained when constraining ?S at the scale of the Z boson mass, mZ, to the current world average. Alternatively, by constraining mt pole to the latest average from direct mass measurements, a value of ?S(mZ)=0.1151-0.0032 +0.0033 is extracted. This is the first determination of ?S using events from top-quark production. © 2013 The Authors ; California Earthquake Authority Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Fuel Cell Technologies Program, FCT Joint Institute for Nuclear Research, JINR Bundesministerium für Wissenschaft und Forschung, BMWF Marketing Science Institute Pakistan Atomic Energy Commission: Pakistan Consejo Nacional de Ciencia y Tecnología National Science and Technology Development Agency: Thailand Institute for Research in Fundamental Sciences Hispanics in Philanthropy California Department of Fish and Game National Research Foundation Secretaría de Estado de Investigación, Desarrollo e Innovación Canadian Mathematical Society U.S. Department of Energy Academy of Finland Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Ministerio de Educación y Cultura Türkiye Atom Enerjisi Kurumu Taipei Research Promotion Foundation: Cyprus, SF0690030s09 National Science Foundation Science and Technology Facilities Council Human Growth Foundation Croatia Austrian Science Fund Fundação de Amparo à Pesquisa do Estado de São Paulo Secretaría de Educación Pública Western Carolina University Fonds De La Recherche Scientifique - FNRS National Academy of Sciences of Ukraine: Ukraine Bundesministerium für Bildung und Forschung National Natural Science Foundation of China Instituto Nazionale di Fisica Nucleare Hungarian Scientific Research Fund Department of Atomic Energy, Government of India Rochester Academy of Science Department of Science and Technology, Government of Rajasthan Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq ?????????? ???? ??????????????? ???????????? (????) Canadian Anesthesiologists' Society Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS Nemzeti Kutatási és Technológiai Hivatal, NKTH: Hungary CERN European Regional Development Fund Serbia NSC General Secretariat for Research and Technology, GSRT Fonds Wetenschappelijk Onderzoek Santa Fe Institute Ministry of Education and Science Louisiana Academy of Sciences ; We thank Alexander Mitov for his help with the NNLO calculations. We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centres and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MES (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER , SF0690030s09 and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON , RosAtom , RAS and RFBR (Russia); MESTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter , IPST , STAR and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). --

Results are presented of a search for compositeness in electrons and muons using a data sample of pp collisions at a center-of-mass energy s=7 TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 5.0 fb-1. Excited leptons (l?) are assumed to be produced via contact interactions in conjunction with a standard model lepton and to decay via l?›l?, yielding a final state with two energetic leptons and a photon. The number of events observed in data is consistent with that expected from the standard model. The 95% confidence upper limits for the cross section for the production and decay of excited electrons (muons), with masses ranging from 0.6 to 2 TeV, are 1.48 to 1.24 fb (1.31 to 1.11 fb). Excited leptons with masses below 1.9 TeV are excluded for the case where the contact interaction scale equals the excited lepton mass. The limits on the cross sections are the most stringent ones published to date. © 2013 CERN ; California Earthquake Authority Serbia European Regional Development Fund Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Fuel Cell Technologies Program, FCT Joint Institute for Nuclear Research, JINR Bangladesh Council of Scientific and Industrial Research Marketing Science Institute Pakistan Atomic Energy Commission: Pakistan Consejo Nacional de Ciencia y Tecnología Fundacja na rzecz Nauki Polskiej Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture, FRIA Hispanics in Philanthropy California Department of Fish and Game National Research Foundation Centers for Medicare and Medicaid Services A.G. Leventis Foundation U.S. Department of Energy Academy of Finland Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Türkiye Atom Enerjisi Kurumu Ministerio de Educación y Cultura Taipei Research Promotion Foundation: Cyprus, SF0690030s09 National Science Foundation Science and Technology Facilities Council Human Growth Foundation Croatia Fundação de Amparo à Pesquisa do Estado de São Paulo Secretaría de Educación Pública Western Carolina University Fonds De La Recherche Scientifique - FNRS National Natural Science Foundation of China Bundesministerium für Bildung und Forschung Ministerio de Ciencia e Innovación, MICINN Instituto Nazionale di Fisica Nucleare Hungarian Scientific Research Fund Department of Atomic Energy, Government of India Rochester Academy of Science Department of Science and Technology, Government of Rajasthan Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq ?????????? ???? ??????????????? ???????????? (????) Belgian Federal Science Policy Office Agentschap voor Innovatie door Wetenschap en Technologie Center for African Studies American Friends of the Alexander von Humboldt Foundation Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS European Commission Nemzeti Kutatási és Technológiai Hivatal, NKTH: Hungary CERN European Regional Development Fund NSC General Secretariat for Research and Technology, GSRT Fonds Wetenschappelijk Onderzoek National Council for Eurasian and East European Research Santa Fe Institute Ministry of Education and Science Louisiana Academy of Sciences ; We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staff at CERN and other CMS institutes, and acknowledge support from: FMSR (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MES (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER , SF0690030s09 and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); I± (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON , RosAtom , RAS and RFBR (Russia); MSTD (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie programme and the European Research Council (European Union); the Leventis Foundation ; the A.P. Sloan Foundation ; the Alexander von Humboldt Foundation ; the Belgian Federal Science Policy Office ; the Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the Council of Scientific and Industrial Research , India; and the HOMING PLUS programme of Foundation for Polish Science , cofinanced from European Union, Regional Development Fund . --

A search for a neutral Higgs boson decaying to a pair of b quarks, and produced in association with at least one additional b quark, is presented. Multijet final states with three jets identified as originating from b quarks, at least one of which may include a non-isolated muon, are studied. The data used in this analysis correspond to an integrated luminosity of 2.7–4.8 fb-1, collected by the CMS experiment in proton-proton collisions at the LHC at a center-of-mass energy of 7 TeV. This search is particularly sensitive to Higgs bosons in scenarios of the Minimal Supersymmetric Model (MSSM) with large values of tan ß. No excess over the predicted background from standard model processes is observed. Stringent upper limits on cross section times branching fraction are derived and interpreted as bounds in the MSSM tan ß and mA parameter-space. Observed 95% confidence level upper limits reach as low as tanß?18 for MA?100 GeV. © 2013 CERN ; California Earthquake Authority Serbia European Regional Development Fund Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Fuel Cell Technologies Program, FCT Joint Institute for Nuclear Research, JINR: Ukraine Marketing Science Institute Bundesministerium für Wissenschaft und Forschung, BMWF Pakistan Atomic Energy Commission: Pakistan Consejo Nacional de Ciencia y Tecnología National Science and Technology Development Agency: Thailand Institute for Research in Fundamental Sciences Fundacja na rzecz Nauki Polskiej Hispanics in Philanthropy Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture, FRIA Korea Research Council for Industrial Science and Technology, ISTK California Department of Fish and Game Compagnia di San Paolo Secretaría de Estado de Investigación, Desarrollo e Innovación National Research Foundation Canadian Mathematical Society A.G. Leventis Foundation U.S. Department of Energy Academy of Finland Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Türkiye Atom Enerjisi Kurumu Ministerio de Educación y Cultura Taipei Research Promotion Foundation: Cyprus, SF0690030s09 National Science Foundation Science and Technology Facilities Council Human Growth Foundation Croatia Austrian Science Fund Fundação de Amparo à Pesquisa do Estado de São Paulo Secretaría de Educación Pública Western Carolina University Fonds De La Recherche Scientifique - FNRS National Academy of Sciences of Ukraine National Natural Science Foundation of China Bundesministerium für Bildung und Forschung Instituto Nazionale di Fisica Nucleare Hungarian Scientific Research Fund Department of Atomic Energy, Government of India Rochester Academy of Science Department of Science and Technology, Government of Rajasthan Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq ?????????? ???? ??????????????? ???????????? (????) Belgian Federal Science Policy Office Canadian Anesthesiologists' Society Agentschap voor Innovatie door Wetenschap en Technologie Alexander von Humboldt-Stiftung Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS Nemzeti Kutatási és Technológiai Hivatal, NKTH: Hungary Ministerstvo Školství, Mládeze a Telovychovy, Not Available European Commission Ministerstvo Školství, Mládeze a Telovychovy, Not Available European Regional Development Fund CERN NSC General Secretariat for Research and Technology, GSRT Fonds Wetenschappelijk Onderzoek European Research Council Santa Fe Institute Louisiana Academy of Sciences A.P. Giannini Foundation ; We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MEYS (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER , SF0690030s09 and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON , RosAtom , RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter , IPST and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie programme and the European Research Council (European Union); the Leventis Foundation ; the A.P. Sloan Foundation ; the Alexander von Humboldt Foundation ; the Belgian Federal Science Policy Office ; the Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium) ; the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium) ; the Ministry of Education, Youth and Sports (MEYS) of Czech Republic; the Council of Science and Industrial Research , India; the Compagnia di San Paolo (Torino); and the HOMING PLUS programme of Foundation for Polish Science , cofinanced from European Union, Regional Development Fund. --

Results are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to µ+µ-. Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at s=7 TeV, corresponding to an integrated luminosity of 5.0 fb-1 recorded with the CMS detector. The shape of the observed transverse momentum distribution of Z bosons is consistent with standard model expectations. Constraints are obtained on models predicting the production of excited quarks decaying via electroweak processes. Assuming a compositeness scale that is equal to the excited quark mass as well as transition coupling strengths between Z bosons and excited quarks that are equal to standard model couplings to quarks, masses of excited quarks below 1.94 TeVare excluded at the 95% confidence level. For excited quark production via a novel contact interaction, masses below 2.22 TeVare excluded, even if the excited quarks do not couple to gluons. © 2013 CERN ; California Earthquake Authority Serbia Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Fuel Cell Technologies Program, FCT Joint Institute for Nuclear Research, JINR: Ukraine Bundesministerium für Wissenschaft und Forschung, BMWF Marketing Science Institute Pakistan Atomic Energy Commission: Pakistan Consejo Nacional de Ciencia y Tecnología Institute for Research in Fundamental Sciences National Electronics and Computer Technology Center: Thailand Hispanics in Philanthropy California Department of Fish and Game National Research Foundation Secretaría de Estado de Investigación, Desarrollo e Innovación Centers for Medicare and Medicaid Services U.S. Department of Energy Academy of Finland Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Ministerio de Educación y Cultura Türkiye Atom Enerjisi Kurumu Taipei Research Promotion Foundation: Cyprus, SF0690030s09 National Science Foundation Science and Technology Facilities Council Human Growth Foundation Croatia Austrian Science Fund Fundação de Amparo à Pesquisa do Estado de São Paulo Secretaría de Educación Pública Western Carolina University Fonds De La Recherche Scientifique - FNRS National Academy of Sciences of Ukraine Bundesministerium für Bildung und Forschung National Natural Science Foundation of China Instituto Nazionale di Fisica Nucleare Hungarian Scientific Research Fund Department of Atomic Energy, Government of India Rochester Academy of Science Department of Science and Technology, Government of Rajasthan Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq ?????????? ???? ??????????????? ???????????? (????) Center for African Studies Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS Nemzeti Kutatási és Technológiai Hivatal, NKTH: Hungary Ministerstvo Školství, Mládeze a Telovychovy, Not Available CERN European Regional Development Fund NSC General Secretariat for Research and Technology, GSRT Fonds Wetenschappelijk Onderzoek Santa Fe Institute Louisiana Academy of Sciences ; We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staff at CERN and other CMS institutes, and acknowledge support from BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MEYS (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER , SF0690030s09 and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON , RosAtom , RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEP , IPST and NECTEC (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). --

Results are reported from a search for non-standard-model Higgs boson decays to pairs of new light bosons, each of which decays into the µ+µ- final state. The new bosons may be produced either promptly or via a decay chain. The data set corresponds to an integrated luminosity of 5.3 fb-1 of proton-proton collisions at s=7 TeV, recorded by the CMS experiment at the LHC in 2011. Such Higgs boson decays are predicted in several scenarios of new physics, including supersymmetric models with extended Higgs sectors or hidden valleys. Thus, the results of the search are relevant for establishing whether the new particle observed in Higgs boson searches at the LHC has the properties expected for a standard model Higgs boson. No excess of events is observed with respect to the yields expected from standard model processes. A model-independent upper limit of 0.86±0.06 fb on the product of the cross section times branching fraction times acceptance is obtained. The results, which are applicable to a broad spectrum of new physics scenarios, are compared with the predictions of two benchmark models as functions of a Higgs boson mass larger than 86 GeV/c2 and of a new light boson mass within the range 0.25-3.55 GeV/c2. © 2013 CERN. ; California Earthquake Authority Serbia Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Fuel Cell Technologies Program, FCT Joint Institute for Nuclear Research, JINR Marketing Science Institute Pakistan Atomic Energy Commission: Pakistan Consejo Nacional de Ciencia y Tecnología Institute for Research in Fundamental Sciences Foundation for Promotion of Material Science and Technology of Japan Hispanics in Philanthropy California Department of Fish and Game National Research Foundation Canadian Mathematical Society U.S. Department of Energy Academy of Finland Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Ministerio de Educación y Cultura Türkiye Atom Enerjisi Kurumu NSC, Taipei Research Promotion Foundation: Cyprus National Science Foundation Science and Technology Facilities Council Human Growth Foundation Croatia Fundação de Amparo à Pesquisa do Estado de São Paulo Secretaría de Educación Pública Western Carolina University Fonds De La Recherche Scientifique - FNRS Bundesministerium für Bildung und Forschung National Natural Science Foundation of China Ministerio de Ciencia e Innovación, MICINN Instituto Nazionale di Fisica Nucleare Hungarian Scientific Research Fund Department of Atomic Energy, Government of India Department of Science and Technology, Government of Rajasthan Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq Canadian Anesthesiologists' Society Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS Nemzeti Kutatási és Technológiai Hivatal, NKTH: Hungary CERN General Secretariat for Research and Technology, GSRT Fonds Wetenschappelijk Onderzoek Santa Fe Institute Ministry of Education and Science Louisiana Academy of Sciences ; We would like to thank Joshua Ruderman (LBNL and University of California at Berkeley) for his guidance with the theoretically motivated benchmark samples of dark SUSY and useful discussions. We wish to congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staff at CERN and other CMS institutes, and acknowledge support from: FMSR (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MES (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); Academy of Sciences and NICPB (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); SCSR (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MST and MAE (Russia); MSTD (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (USA). --

A search has been made for massive resonances decaying into a quark and a vector boson, qW or qZ, or a pair of vector bosons, WW, WZ, or ZZ, where each vector boson decays to hadronic final states. This search is based on a data sample corresponding to an integrated luminosity of 5.0 fb-1 of proton-proton collisions collected in the CMS experiment at the LHC in 2011 at a center-of-mass energy of 7 TeV. For sufficiently heavy resonances the decay products of each vector boson are merged into a single jet, and the event effectively has a dijet topology. The background from QCD dijet events is reduced using recently developed techniques that resolve jet substructure. A 95% CL lower limit is set on the mass of excited quark resonances decaying into qW (qZ) at 2.38 TeV (2.15 TeV) and upper limits are set on the cross section for resonances decaying to qW, qZ, WW, WZ, or ZZ final states. © 2013 CERN. Published by Elsevier B.V. ; California Earthquake Authority Serbia Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Fuel Cell Technologies Program, FCT Joint Institute for Nuclear Research, JINR: Ukraine Marketing Science Institute Bundesministerium für Wissenschaft und Forschung, BMWF Pakistan Atomic Energy Commission: Pakistan Consejo Nacional de Ciencia y Tecnología National Science and Technology Development Agency: Thailand Institute for Research in Fundamental Sciences Hispanics in Philanthropy California Department of Fish and Game National Research Foundation Secretaría de Estado de Investigación, Desarrollo e Innovación Canadian Mathematical Society U.S. Department of Energy Academy of Finland Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Ministerio de Educación y Cultura Türkiye Atom Enerjisi Kurumu Taipei Research Promotion Foundation: Cyprus, SF0690030s09 National Science Foundation Science and Technology Facilities Council Human Growth Foundation Croatia Austrian Science Fund Fundação de Amparo à Pesquisa do Estado de São Paulo Secretaría de Educación Pública Western Carolina University Fonds De La Recherche Scientifique - FNRS National Academy of Sciences of Ukraine Bundesministerium für Bildung und Forschung National Natural Science Foundation of China Instituto Nazionale di Fisica Nucleare Hungarian Scientific Research Fund Department of Atomic Energy, Government of India Rochester Academy of Science Department of Science and Technology, Government of Rajasthan Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq ?????????? ???? ??????????????? ???????????? (????) Canadian Anesthesiologists' Society Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS Ministerstvo Školství, Mládeze a Telovychovy, Not Available Nemzeti Kutatási és Technológiai Hivatal, NKTH: Hungary CERN European Regional Development Fund NSC General Secretariat for Research and Technology, GSRT Fonds Wetenschappelijk Onderzoek Santa Fe Institute Louisiana Academy of Sciences ; We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centres and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MEYS (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER , SF0690030s09 and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON , RosAtom , RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter , IPST and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). --

Results are presented from a search for long-lived neutralinos decaying into a photon and an invisible particle, a signature associated with gauge-mediated supersymmetry breaking in supersymmetric models. The analysis is based on a 4.9fb-1 sample of proton-proton collisions at s=7TeV, collected with the CMS detector at the LHC. The missing transverse energy and the time of arrival of the photon at the electromagnetic calorimeter are used to search for an excess of events over the expected background. No significant excess is observed, and lower limits at the 95% confidence level are obtained on the mass of the lightest neutralino, m>220GeV (for c?6000mm (for m<150GeV). © 2013 CERN ; California Earthquake Authority Serbia Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Fuel Cell Technologies Program, FCT Joint Institute for Nuclear Research, JINR: Ukraine Bundesministerium für Wissenschaft und Forschung, BMWF Marketing Science Institute Pakistan Atomic Energy Commission: Pakistan Consejo Nacional de Ciencia y Tecnología National Science and Technology Development Agency: Thailand Institute for Research in Fundamental Sciences Hispanics in Philanthropy California Department of Fish and Game Secretaría de Estado de Investigación, Desarrollo e Innovación National Research Foundation Centers for Medicare and Medicaid Services U.S. Department of Energy Academy of Finland Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Türkiye Atom Enerjisi Kurumu Ministerio de Educación y Cultura Taipei Research Promotion Foundation: Cyprus, SF0690030s09 National Science Foundation Science and Technology Facilities Council Human Growth Foundation Croatia Austrian Science Fund Fundação de Amparo à Pesquisa do Estado de São Paulo Secretaría de Educación Pública Western Carolina University Fonds De La Recherche Scientifique - FNRS National Academy of Sciences of Ukraine National Natural Science Foundation of China Bundesministerium für Bildung und Forschung Instituto Nazionale di Fisica Nucleare Hungarian Scientific Research Fund Department of Atomic Energy, Government of India Rochester Academy of Science Department of Science and Technology, Government of Rajasthan Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq ?????????? ???? ??????????????? ???????????? (????) Center for African Studies Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS Nemzeti Kutatási és Technológiai Hivatal, NKTH: Hungary Ministerstvo Školství, Mládeze a Telovychovy, Not Available European Regional Development Fund CERN NSC General Secretariat for Research and Technology, GSRT Fonds Wetenschappelijk Onderzoek Santa Fe Institute Louisiana Academy of Sciences ; We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MEYS (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER , SF0690030s09 and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON , RosAtom , RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter , IPST and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). --

Measurements of event shapes and azimuthal correlations are presented for events where a Z boson is produced in association with jets in proton-proton collisions. The data collected with the CMS detector at the CERN LHC at s=7 TeV correspond to an integrated luminosity of 5.0 fb-1. The analysis provides a test of predictions from perturbative QCD for a process that represents a substantial background to many physics channels. Results are presented as a function of jet multiplicity, for inclusive Z boson production and for Z bosons with transverse momenta greater than 150 GeV, and compared to predictions from Monte Carlo event generators that include leading-order multiparton matrix-element (with up to four hard partons in the final state) and next-to-leading-order simulations of Z+1-jet events. The experimental results are corrected for detector effects, and can be compared directly with other QCD models. © 2013 CERN ; California Earthquake Authority Serbia Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Fuel Cell Technologies Program, FCT Joint Institute for Nuclear Research, JINR: Ukraine Marketing Science Institute Bundesministerium für Wissenschaft und Forschung, BMWF Pakistan Atomic Energy Commission: Pakistan Consejo Nacional de Ciencia y Tecnología National Science and Technology Development Agency: Thailand Institute for Research in Fundamental Sciences Hispanics in Philanthropy California Department of Fish and Game National Research Foundation Secretaría de Estado de Investigación, Desarrollo e Innovación Centers for Medicare and Medicaid Services U.S. Department of Energy Academy of Finland Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Türkiye Atom Enerjisi Kurumu Ministerio de Educación y Cultura Taipei Research Promotion Foundation: Cyprus, SF0690030s09 National Science Foundation Science and Technology Facilities Council Human Growth Foundation Croatia Austrian Science Fund Fundação de Amparo à Pesquisa do Estado de São Paulo Secretaría de Educación Pública Western Carolina University Fonds De La Recherche Scientifique - FNRS National Academy of Sciences of Ukraine Bundesministerium für Bildung und Forschung National Natural Science Foundation of China Instituto Nazionale di Fisica Nucleare Hungarian Scientific Research Fund Department of Atomic Energy, Government of India Rochester Academy of Science Department of Science and Technology, Government of Rajasthan Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq ?????????? ???? ??????????????? ???????????? (????) Center for African Studies Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS Ministerstvo Školství, Mládeze a Telovychovy, Not Available Nemzeti Kutatási és Technológiai Hivatal, NKTH: Hungary European Regional Development Fund CERN NSC General Secretariat for Research and Technology, GSRT Fonds Wetenschappelijk Onderzoek Santa Fe Institute Louisiana Academy of Sciences ; We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MEYS (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER , SF0690030s09 and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON , RosAtom , RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter , IPST and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). --

A measurement is presented of the inelastic proton-proton cross section at a centre-of-mass energy of ?s=7 TeV. Using the CMS detector at the LHC, the inelastic cross section is measured through two independent methods based on information from (i) forward calorimetry (for pseudorapidity 3200 MeV/c. The measurements cover a large fraction of the inelastic cross section for particle production over about nine units of pseudorapidity and down to small transverse momenta. The results are compared with those of other experiments, and with models used to describe high-energy hadronic interactions. © 2013 CERN. ; California Earthquake Authority Serbia Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Fuel Cell Technologies Program, FCT Joint Institute for Nuclear Research, JINR: Ukraine Bundesministerium für Wissenschaft und Forschung, BMWF Marketing Science Institute Pakistan Atomic Energy Commission: Pakistan Consejo Nacional de Ciencia y Tecnología Institute for Research in Fundamental Sciences National Electronics and Computer Technology Center: Thailand Hispanics in Philanthropy California Department of Fish and Game Secretaría de Estado de Investigación, Desarrollo e Innovación National Research Foundation Canadian Mathematical Society U.S. Department of Energy Academy of Finland Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Ministerio de Educación y Cultura Türkiye Atom Enerjisi Kurumu Taipei Research Promotion Foundation: Cyprus, SF0690030s09 National Science Foundation Science and Technology Facilities Council Human Growth Foundation Croatia Austrian Science Fund Fundação de Amparo à Pesquisa do Estado de São Paulo Secretaría de Educación Pública Western Carolina University Fonds De La Recherche Scientifique - FNRS National Academy of Sciences of Ukraine Bundesministerium für Bildung und Forschung National Natural Science Foundation of China Instituto Nazionale di Fisica Nucleare Hungarian Scientific Research Fund Department of Atomic Energy, Government of India Rochester Academy of Science Department of Science and Technology, Government of Rajasthan Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq ?????????? ???? ??????????????? ???????????? (????) Canadian Anesthesiologists' Society Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS Ministerstvo Školství, Mládeze a Telovychovy, Not Available Nemzeti Kutatási és Technológiai Hivatal, NKTH: Hungary CERN European Regional Development Fund NSC General Secretariat for Research and Technology, GSRT Fonds Wetenschappelijk Onderzoek Santa Fe Institute Louisiana Academy of Sciences ; We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staffs at CERN and other CMS institutes, and acknowledge support from BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MEYS (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER , SF0690030s09 and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON , RosAtom , RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEP , IPST and NECTEC (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). --

The W+W- and ZZ production cross sections are measured in proton-proton collisions at s=8TeV with the CMS experiment at the LHC in data samples corresponding to an integrated luminosity of up to 5.3fb-1. The measurements are performed in the leptonic decay modes W+W-›l'?l¨? and ZZ›2l2l', where l=e,µ and l'(l¨)=e,µ,?. The measured cross sections ?(pp›W+W-)=69.9±2.8(stat.)±5.6(syst.)±3.1(lum.) pb and ?(pp›ZZ)=8.4±1.0(stat.)±0.7(syst.)±0.4(lum.) pb, for both Z bosons produced in the mass region 60

An updated search for heavy narrow resonances decaying to muon or electron pairs using the CMS detector is presented. Data samples from pp collisions at s=7 TeV and 8 TeV at the LHC, with integrated luminosities of up to 5.3 and 4.1 fb-1, respectively, are combined. No evidence for a heavy narrow resonance is observed. The analysis of the combined data sets excludes, at 95% confidence level, a Sequential Standard Model ZSSM ' resonance lighter than 2590 GeV, a superstring-inspired Z? ' lighter than 2260 GeV, and Kaluza–Klein gravitons lighter than 2390 (2030) GeV, assuming that the coupling parameter k/M¯Pl is 0.10 (0.05). These are the most stringent limits to date. © 2012 CERN ; California Earthquake Authority Serbia Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Fuel Cell Technologies Program Joint Institute for Nuclear Research: Ukraine Bundesministerium für Wissenschaft und Forschung Marketing Science Institute Pakistan Atomic Energy Commission: Pakistan Consejo Nacional de Ciencia y Tecnología National Science and Technology Development Agency: Thailand Institute for Research in Fundamental Sciences Hispanics in Philanthropy California Department of Fish and Game Secretaría de Estado de Investigación, Desarrollo e Innovación National Research Foundation Centers for Medicare and Medicaid Services U.S. Department of Energy Academy of Finland Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Ministerio de Educación y Cultura Türkiye Atom Enerjisi Kurumu Taipei Research Promotion Foundation: Cyprus, SF0690030s09 National Sleep Foundation Science and Technology Facilities Council Human Growth Foundation Croatia Austrian Science Fund Fundação de Amparo à Pesquisa do Estado de São Paulo Secretaría de Educación Pública Western Carolina University Fonds De La Recherche Scientifique - FNRS National Academy of Sciences of Ukraine Bundesministerium für Bildung und Forschung National Natural Science Foundation of China Instituto Nazionale di Fisica Nucleare Hungarian Scientific Research Fund Department of Atomic Energy, Government of India Rochester Academy of Science Department of Science and Technology, Government of Rajasthan Conselho Nacional de Desenvolvimento Científico e Tecnológico ?????????? ???? ??????????????? ???????????? (????) Center for African Studies Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS Nemzeti Kutatási és Technológiai Hivatal: Hungary Ministerstvo Školství, Mládeze a Telovychovy CERN European Regional Development Fund NSC General Secretariat for Research and Technology Fonds Wetenschappelijk Onderzoek Santa Fe Institute Louisiana Academy of Sciences ; We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MEYS (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER , SF0690030s09 and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON , RosAtom , RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter , IPST and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). --

A measurement of the tt¯ production cross section in pp collisions at s=7 TeV is presented. The results are based on data corresponding to an integrated luminosity of 2.3 fb-1 collected by the CMS detector at the LHC. Selected events are required to have one isolated, high transverse momentum electron or muon, large missing transverse energy, and hadronic jets, at least one of which must be consistent with having originated from a b quark. The measured cross section is 158.1±2.1(stat.)±10.2(syst.)±3.5(lum.) pb, in agreement with standard model predictions. © 2013 CERN ; California Earthquake Authority Serbia European Regional Development Fund Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Fuel Cell Technologies Program, FCT Joint Institute for Nuclear Research, JINR: Ukraine Marketing Science Institute Bundesministerium für Wissenschaft und Forschung, BMWF Pakistan Atomic Energy Commission: Pakistan Consejo Nacional de Ciencia y Tecnología National Science and Technology Development Agency: Thailand Institute for Research in Fundamental Sciences Fundacja na rzecz Nauki Polskiej Social Science Research Council Hispanics in Philanthropy Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture, FRIA Compagnia di San Paolo California Department of Fish and Game Secretaría de Estado de Investigación, Desarrollo e Innovación National Research Foundation Centers for Medicare and Medicaid Services A.G. Leventis Foundation U.S. Department of Energy Academy of Finland Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Türkiye Atom Enerjisi Kurumu Ministerio de Educación y Cultura Taipei Research Promotion Foundation: Cyprus, SF0690030s09 National Science Foundation Science and Technology Facilities Council Human Growth Foundation Croatia Austrian Science Fund Fundação de Amparo à Pesquisa do Estado de São Paulo Secretaría de Educación Pública Western Carolina University Fonds De La Recherche Scientifique - FNRS National Academy of Sciences of Ukraine National Natural Science Foundation of China Bundesministerium für Bildung und Forschung Instituto Nazionale di Fisica Nucleare Hungarian Scientific Research Fund Department of Atomic Energy, Government of India Rochester Academy of Science Department of Science and Technology, Government of Rajasthan Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq ?????????? ???? ??????????????? ???????????? (????) Center for African Studies Belgian Federal Science Policy Office Agentschap voor Innovatie door Wetenschap en Technologie American Friends of the Alexander von Humboldt Foundation Departamento Administrativo de Ciencia, Tecnología e Innovación, COLCIENCIAS Ministerstvo Školství, Mládeze a Telovychovy, Not Available European Commission Nemzeti Kutatási és Technológiai Hivatal, NKTH: Hungary European Regional Development Fund CERN Ministerstvo Školství, Mládeze a Telovychovy, Not Available NSC General Secretariat for Research and Technology, GSRT Fonds Wetenschappelijk Onderzoek National Council for Eurasian and East European Research Santa Fe Institute Louisiana Academy of Sciences A.P. Giannini Foundation ; We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centres and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , and FAPESP (Brazil); MEYS (Bulgaria); CERN ; CAS , MoST , and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER , SF0690030s09 and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); CINVESTAV , CONACYT , SEP , and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON , RosAtom , RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter , IPST and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie programme and the European Research Council (European Union) ; the Leventis Foundation ; the A.P. Sloan Foundation ; the Alexander von Humboldt Foundation ; the Belgian Federal Science Policy Office ; the Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium) ; the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium) ; the Ministry of Education, Youth and Sports (MEYS) of Czech Republic ; the Council of Science and Industrial Research , India; the Compagnia di San Paolo (Torino) ; and the HOMING PLUS programme of Foundation for Polish Science , cofinanced from European Union, Regional Development Fund . --