The Deep Underground Neutrino Experiment is a next-generation neutrino oscillation experiment that aims to measure CP-violation in the neutrino sector as part of a wider physics program. A deep learning approach based on a convolutional neural network has been developed to provide highly efficient and pure selections of electron neutrino and muon neutrino charged-current interactions. The electron neutrino (antineutrino) selection efficiency peaks at 90% (94%) and exceeds 85% (90%) for reconstructed neutrino energies between 2–5 GeV. The muon neutrino (antineutrino) event selection is found to have a maximum efficiency of 96% (97%) and exceeds 90% (95%) efficiency for reconstructed neutrino energies above 2 GeV. When considering all electron neutrino and antineutrino interactions as signal, a selection purity of 90% is achieved. These event selections are critical to maximize the sensitivity of the experiment to CP-violating effects. ; Fermi Research Alliance, LLC (FRA) DE-AC02-07CH11359 ; National Council for Scientific and Technological Development (CNPq) ; Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ) ; FAPEG, Brazil ; Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) ; Canada Foundation for Innovation ; Institute of Particle Physics, Canada ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; CERN ; Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government ; ERDF, European Union ; H2020-EU, European Union ; MSCA, European Union ; Centre National de la Recherche Scientifique (CNRS) ; French Atomic Energy Commission ; Istituto Nazionale di Fisica Nucleare (INFN) ; Portuguese Foundation for Science and Technology European Commission ; NRF, South Korea ; Comunidad de Madrid ; La Caixa Foundation ; Spanish Government ; State Secretariat for Education, Research and Innovation, Switzerland ; Swiss National Science Foundation (SNSF) ; Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) ; Royal Society of London ; UKRI/STFC, United Kingdom ; United States Department of Energy (DOE) ; National Science Foundation (NSF)
This document was prepared by the DUNE collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. This work was supported by CNPq, FAPERJ, FAPEG and FAPESP, Brazil; CFI, IPP and NSERC, Canada; CERN; MŠMT, Czech Repub lic; ERDF, H2020-EU and MSCA, European Union; CNRS/IN2P3 and CEA, France; INFN, Italy; FCT, Portugal; NRF, South Korea; CAM, Fundación "La Caixa", Junta de Andalucía FEDER, and MICINN, Spain; SERI and SNSF, Switzerland; TÜBİTAK, Turkey; The Royal Society and UKRI/STFC, United Kingdom; DOE and NSF, United States of America. We are grateful to Xerxes Tata for useful discussions. C. Rott acknowledges support from the National Research Foundation of Korea. ; The observation of 236 MeV muon neutrinos from kaon-decay-at-rest (KDAR) originating in the core of the Sun would provide a unique signature of dark matter annihilation. Since excellent angle and energy reconstruction are necessary to detect this monoenergetic, directional neutrino flux, DUNE with its vast volume and reconstruction capabilities, is a promising candidate for a KDAR neutrino search. In this work, we evaluate the proposed KDAR neutrino search strategies by realistically modeling both neutrino-nucleus interactions and the response of DUNE. We find that, although reconstruction of the neutrino energy and direction is difficult with current techniques in the relevant energy range, the superb energy resolution, angular resolution, and particle identification offered by DUNE can still permit great signal/background discrimination. Moreover, there are non-standard scenarios in which searches at DUNE for KDAR in the Sun can probe dark matter interactions. ; Fermi National Accelerator Laboratory (Fermilab) No. DE-AC02-07CH11359. ; CNPq ; CNPq, FAPERJ, FAPEG y FAPESP, Brasil ; CFI, IPP y NSERC, Canadá ; CERN ; MŠMT, República Checa ; FEDER ; H2020-UE ; MSCA, Unión Europea ; CNRS/IN2P3 y CEA, Francia ; INFN, Italia ; FCT, Portugal ; NRF, Corea del Sur ; CAM, Fundación "La Caixa" ; Junta de Andalucía FEDER, y MICINN, España ; SERI y SNSF, Suiza ; TübİTAK, Turquía ; La Real Sociedad y UKRI/STFC, Reino Unido ; DOE y NSF, Estados Unidos de América
The Deep Underground Neutrino Experiment (DUNE) will produce world-leading neutrino oscillation measurements over the lifetime of the experiment. In this work, we explore DUNE's sensitivity to observe charge-parity violation (CPV) in the neutrino sector, and to resolve the mass ordering, for exposures of up to 100 kiloton-megawatt-calendar years (kt-MW-CY), where calendar years include an assumption of 57% accelerator uptime based on past accelerator performance at Fermilab. The analysis includes detailed uncertainties on the flux prediction, the neutrino interaction model, and detector effects. We demonstrate that DUNE will be able to unambiguously resolve the neutrino mass ordering at a 4σ (5σ) level with a 66 (100) kt-MW-CY far detector exposure, and has the ability to make strong statements at significantly shorter exposures depending on the true value of other oscillation parameters, with a median sensitivity of 3σ for almost all true δCP values after only 24 kt-MW-CY. We also show that DUNE has the potential to make a robust measurement of CPV at a 3σ level with a 100 kt-MW-CY exposure for the maximally CP-violating values δCP ¼ π=2. Additionally, the dependence of DUNE's sensitivity on the exposure taken in neutrino-enhanced and antineutrino-enhanced running is discussed. An equal fraction of exposure taken in each beam mode is found to be close to optimal when considered over the entire space of interest. ; Fermi Research Alliance, LLC (FRA) DE-AC02-07CH11359 ; CNPq, FAPERJ, FAPEG and FAPESP, Brazil ; CFI, Institute of Particle Physics (IPP) and NSERC, Canada ; CERN ; MŠMT, Czech Republic ; ERDF, H2020-EU and MSCA, European Union ; CNRS/IN2P3 and CEA, France ; INFN, Italy ; FCT, Portugal ; NRF, South Korea ; Comunidad de Madrid (CAM), Fundación "La Caixa," Junta de Andalucía-FEDER, and MICINN, Spain ; SERI and SNSF, Switzerland ; TÜBİTAK, Turkey ; The Royal Society and UKRI/STFC, United Kingdom ; DOE and NSF, United States of America
The successful installation, commissioning, and operation of the Pierre Auger Observatory would not have been possible without the strong commitment and effort from the technical and administrative staff in Malargüe. We are very grateful to the following agencies and organizations for financial support: Comisión Nacional de Energía Atómica, Fundación Antorchas, Gobierno De La Provincia de Mendoza, Municipalidad de Malargüe, NDM Holdings and Valle Las Leñas, in gratitude for their continuing cooperation over land access, Argentina; the Australian Research Council; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Financiadora de Estudos e Projetos (FINEP), Fundação de Amparo à Pesquisa do Estado de Rio de Janeiro (FAPERJ), São Paulo Research Foundation (FAPESP) Grants # 2010/07359-6 and # 1999/05404-3, Ministério de Ciência e Tecnologia (MCT), Brazil; MSMT-CR LG13007, 7AMB14AR005, CZ.1.05/2.1.00/03.0058 and the Czech Science Foundation Grant 14-17501S, Czech Republic; Centre de Calcul IN2P3/CNRS, Centre National de la Recherche Scientifique (CNRS), Conseil Régional Ile-de-France, Département Physique Nucléaire et Corpusculaire (PNC-IN2P3/CNRS), Département Sciences de l'Univers (SDU-INSU/CNRS), Institut Lagrange de Paris, ILP LABEX ANR-10-LABX-63, within the Investissements d'Avenir ProgrammeANR-11-IDEX-0004-02, France; Bundesministerium für Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Finanzministerium Baden-Württemberg, Helmholtz Alliance for Astroparticle Physics (HAP), Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF), Ministerium für Wissenschaft und Forschung, Nordrhein Westfalen, Ministerium für Wissenschaft, Forschung und Kunst, Baden-Württemberg, Germany; Istituto Nazionale di Astrofisica (INAF), Istituto Nazionale di Fisica Nucleare (INFN), Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR), Gran Sasso Center for Astroparticle Physics (CFA), CETEMPS Center of Excellence, Italy; Consejo Nacional de Ciencia y Tecnología (CONACYT), Mexico; Ministerie van Onderwijs, Cultuur en Wetenschap, Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Stichting voor Fundamenteel Onderzoek der Materie (FOM), Netherlands; National Centre for Research and Development, Grant nos. ERA-NETASPERA/01/11 and ERA-NET-ASPERA/02/11, National Science Centre, Grant nos. 2013/08/M/ST9/00322, and 2013/08/M/ST9/00728 and HARMONIA 5 – 2013/10/M/ST9/00062, Poland; Portuguese national funds and FEDER funds within COMPETE – Programa Operacional Factores de Competitividade through Fundação para a Ciencia e a Tecnologia, Portugal; Romanian Authority for Scientific Research ANCS, CNDI-UEFISCDI partnership projects nos. 20/2012 and nr.194/2012, project nos. 1/ASPERA2/2012 ERA-NET, PN-II-RU-PD-2011-3-0145-17, and PN-II-RU-PD-2011- 3-0062, the Minister of National Education, Programme for research – Space Technology and Advanced Research – STAR, project number 83/2013, Romania; Slovenian Research Agency, Slovenia; Comunidad de Madrid, FEDER funds, Ministerio de Educación y Ciencia, Xunta de Galicia, European Community 7th Framework Program, Grant no. FP7-PEOPLE-2012-IEF-328826, Spain; Science and Technology Facilities Council, United Kingdom; Department of Energy, Contract no. DE-AC02-07CH11359, DE-FR02-04ER41300, DE-FG02-99ER41107 and DE-SC0011689, National Science Foundation, Grant no. 0450696, The Grainger Foundation, USA; NAFOSTED, Vietnam; Marie Curie-IRSES/EPLANET, European Particle Physics Latin American Network, European Union 7th Framework Program, Grant no. PIRSES-2009- GA-246806; and UNESCO. ; The Pierre Auger Observatory, located on a vast, high plain in western Argentina, is the world׳s largest cosmic ray observatory. The objectives of the Observatory are to probe the origin and characteristics of cosmic rays above 1017 eV and to study the interactions of these, the most energetic particles observed in nature. The Auger design features an array of 1660 water Cherenkov particle detector stations spread over 3000 km2 overlooked by 24 air fluorescence telescopes. In addition, three high elevation fluorescence telescopes overlook a 23.5 km2, 61-detector infilled array with 750 m spacing. The Observatory has been in successful operation since completion in 2008 and has recorded data from an exposure exceeding 40,000 km2 sr yr. This paper describes the design and performance of the detectors, related subsystems and infrastructure that make up the Observatory. ; Comision Nacional de Energia Atomica ; Fundacion Antorchas ; Gobierno De La Provincia de Mendoza ; Municipalidad de Malargue ; NDM Holdings and Valle Las Lenas ; Australian Research Council ; National Council for Scientific and Technological Development (CNPq) ; Ciencia Tecnologia e Inovacao (FINEP) ; Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ) ; Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) 2010/07359-6 1999/05404-3 ; Ministerio de Ciencia e Tecnologia (MCT), Brazil ; Ministry of Education, Youth & Sports - Czech Republic LG13007 7AMB14AR005 CZ.1.05/2.1.00/03.0058 ; Grant Agency of the Czech Republic Czech Republic Government 14-17501S ; Centre National de la Recherche Scientifique (CNRS) ; Region Ile-de-France ; Departement Physique Nucleaire et Corpusculaire PNC-IN2P3/CNRS ; Departement Sciences de l'Univers (SDU-INSU/CNRS) ; Institut Lagrange de Paris ; French National Research Agency (ANR) ANR-11-IDEX-0004-02 ANR-10-LABX-63 ; Federal Ministry of Education & Research (BMBF) ; German Research Foundation (DFG) ; Finanzministerium Baden-Wurttemberg ; Helmholtz Alliance for Astroparticle Physics (HAP) ; Helmholtz Association ; Ministerium fur Wissenschaft und Forschung ; Nordrhein Westfalen ; Ministerium fur Wissenschaft ; Forschung und Kunst ; Baden-Wurttemberg, Germany ; Istituto Nazionale Astrofisica (INAF) ; Istituto Nazionale di Fisica Nucleare (INFN) ; Ministry of Education, Universities and Research (MIUR) ; Gran Sasso Center for Astroparticle Physics (CFA) ; CETEMPS Center of Excellence, Italy ; Consejo Nacional de Ciencia y Tecnologia (CONACyT) ; Ministerie van Onderwijs ; Cultuur en Wetenschap ; Netherlands Organization for Scientific Research (NWO) ; FOM (The Netherlands) Netherlands Government ; National Centre for Research and Development ERA-NET-ASPERA/01/11 ERA-NET-ASPERA/02/11 ; National Science Centre, Poland 2013/08/M/ST9/00322 2013/08/M/ST9/00728 HARMONIA 5 - 2013/10/M/ST9/00062 ; Portuguese national funds ; FEDER funds within COMPETE - Programa Operacional Factores de Competitividade through Fundacao para a Ciencia e a Tecnologia, Portugal ; Romanian Authority for Scientific Research ANCS ; CNDI-UEFISCDI 20/2012 194/2012 1/ASPERA2/2012 ERA-NET PN-II-RU-PD-2011-3-0145-17 PN-II-RU-PD-2011-3-0062 ; Programme for research - Space Technology and Advanced Research - STAR, Romania 83/2013 ; Slovenian Research Agency - Slovenia ; Comunidad de Madrid Instituto de Salud Carlos III ; European Union (EU) ; Spanish Government ; Xunta de Galicia ; European Community, Spain FP7-PEOPLE-2012-IEF-328826 ; Science & Technology Facilities Council (STFC) ; United States Department of Energy (DOE) DE-AC02-07CH11359 DE-FR02-04ER41300 DE-FG02-99ER41107 DE-SC0011689 ; National Science Foundation (NSF) 0450696 ; Grainger Foundation, USA ; National Foundation for Science & Technology Development (NAFOSTED) ; Marie Curie-IRSES/EPLANET ; European Particle Physics Latin American Network ; European Union (EU) PIRSES-2009-GA-246806 ; UNESCO
The successful installation, commissioning, and operation of the Pierre Auger Observatory would not have been possible without the strong commitment and effort from the technical and administrative staff in Malargue. We are very grateful to the following agencies and organizations for financial support: Comision Nacional de Energia Atomica, Fundacion Antorchas, Gobierno De La Provincia de Mendoza, Municipalidad de Malargue, NDM Holdings and Valle Las Lenas, in gratitude for their continuing cooperation over land access, Argentina; the Australian Research Council; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Financiadora de Estudos e Projetos (FINEP), Fundacao de Amparo a Pesquisa do Estado de Rio de Janeiro (FAPERJ), Sao Paulo Research Foundation (FAPESP) Grants No. 2010/07359-6, No. 1999/05404-3, Ministerio de Ciencia e Tecnologia (MCT), Brazil; MSMT-CR LG13007, 7AMB14AR005, CZ.1.05/2.1.00/03.0058 and the Czech Science Foundation Grant No. 14-17501S, Czech Republic; Centre de Calcul IN2P3/CNRS, Centre National de la Recherche Scientifique (CNRS), Conseil Regional Ile-de-France, Departement Physique Nucleaire et Corpusculaire (PNC-IN2P3/CNRS), Departement Sciences de l'Univers (SDU-INSU/CNRS), Institut Lagrange de Paris, ILP LABEX ANR-10-LABX-63, within the Investissements d'Avenir Programme ANR-11-IDEX-0004-02, France; Bundesministerium fur Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Finanzministerium Baden-Wurttemberg, Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF), Ministerium fur Wissenschaft und Forschung, Nordrhein Westfalen, Ministerium fur Wissenschaft, Forschung und Kunst, Baden-Wurttemberg, Germany; Istituto Nazionale di Fisica Nucleare (INFN), Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR), Gran Sasso Center for Astroparticle Physics (CFA), CETEMPS Center of Excellence, Italy; Consejo Nacional de Ciencia y Tecnologia (CONACYT), Mexico; Ministerie van Onderwijs, Cultuur en Wetenschap, Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Stichting voor Fundamenteel Onderzoek der Materie (FOM), Netherlands; National Centre for Research and Development, Grants No. ERA-NET-ASPERA/01/11 and No. ERA-NET-ASPERA/02/11, National Science Centre, Grants No. 2013/08/M/ST9/00322, No. 2013/08/M/ST9/00728 and No. HARMONIA 5 - 2013/10/M/ST9/00062, Poland; Portuguese national funds and FEDER funds within COMPETE - Programa Operacional Factores de Competitividade through Fundacao para a Ciencia e a Tecnologia, Portugal; Romanian Authority for Scientific Research ANCS, CNDI-UEFISCDI partnership projects nr. 20/2012 and nr. 194/2012, project nr. 1/ASPERA2/2012 ERA-NET, PN-II-RU-PD-2011-3-0145-17, and PN-II-RU-PD-2011-3-0062, the Minister of National Education, Programme for research - Space Technology and Advanced Research - STAR, project no. 83/2013, Romania; Slovenian Research Agency, Slovenia; Comunidad de Madrid, FEDER funds, Ministerio de Educacion y Ciencia, Xunta de Galicia, European Community 7th Framework Program, Grant No. FP7-PEOPLE-2012-IEF-328826, Spain; Science and Technology Facilities Council, U.K.; Department of Energy, Contracts No. DE-AC02-07CH11359, No. DE-FR02-04ER41300, No. DE-FG02-99ER41107 and No. DE-SC0011689, National Science Foundation, Grant No. 0450696, The Grainger Foundation, USA; NAFOSTED, Vietnam; Marie Curie-IRSES/EPLANET, European Particle Physics Latin American Network, European Union 7th Framework Program, Grant No. PIRSES-2009-GA-246806; and UNESCO. ; We report a study of the distributions of the depth of maximum, Xmax, of extensive air-shower profiles with energies above 1017.8 eV as observed with the fluorescence telescopes of the Pierre Auger Observatory. The analysis method for selecting a data sample with minimal sampling bias is described in detail as well as the experimental cross-checks and systematic uncertainties. Furthermore, we discuss the detector acceptance and the resolution of the Xmax measurement and provide parametrizations thereof as a function of energy. The energy dependence of the mean and standard deviation of the Xmax distributions are compared to air-shower simulations for different nuclear primaries and interpreted in terms of the mean and variance of the logarithmic mass distribution at the top of the atmosphere. ; Comision Nacional de Energia Atomica ; Fundacion Antorchas ; Gobierno De La Provincia de Mendoza ; Municipalidad de Malargue ; NDM Holdings ; Valle Las Lenas ; Australian Research Council ; National Council for Scientific and Technological Development (CNPq) ; Ciencia Tecnologia e Inovacao (FINEP) ; Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ) ; Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) 2010/07359-6 1999/05404-3 ; Ministerio de Ciencia e Tecnologia (MCT), Brazil ; Grant Agency of the Czech Republic Czech Republic Government 14-17501S ; Centre National de la Recherche Scientifique (CNRS) ; Region Ile-de-France ; Departement Sciences de l'Univers (SDU-INSU/CNRS) ; Institut Lagrange de Paris ; French National Research Agency (ANR) ANR-10-LABX-63 ANR-11-IDEX-0004-02 ; Federal Ministry of Education & Research (BMBF) ; German Research Foundation (DFG) ; Finanzministerium Baden-Wurttemberg ; Helmholtz Association ; Ministerium fur Wissenschaft und Forschung ; Nordrhein Westfalen ; Ministerium fur Wissenschaft ; Forschung und Kunst ; Baden-Wurttemberg, Germany ; Istituto Nazionale di Fisica Nucleare (INFN) ; Ministry of Education, Universities and Research (MIUR) ; Gran Sasso Center for Astroparticle Physics (CFA) ; CETEMPS Center of Excellence, Italy ; Consejo Nacional de Ciencia y Tecnologia (CONACyT) ; Ministerie van Onderwijs, Cultuur en Wetenschap ; Netherlands Organization for Scientific Research (NWO) ; FOM (The Netherlands) Netherlands Government ; National Centre for Research and Development ERA-NET-ASPERA/01/11 ERA-NET-ASPERA/02/11 ; National Science Centre, Poland 2013/08/M/ST9/00322 2013/08/M/ST9/00728 HARMONIA 5 - 2013/10/M/ST9/00062 ; Portuguese national funds within COMPETE - Programa Operacional Factores de Competitividade through Fundacao para a Ciencia e a Tecnologia, Portugal ; FEDER funds within COMPETE - Programa Operacional Factores de Competitividade through Fundacao para a Ciencia e a Tecnologia, Portugal ; Romanian Authority for Scientific Research ANCS ; CNDI-UEFISCDI 20/2012 194/2012 1/ASPERA2/2012 ERA-NET PN-II-RU-PD-2011-3-0145-17 PN-II-RU-PD-2011-3-0062 ; Minister of National Education, Programme for research - Space Technology and Advanced Research - STAR, Romania 83/2013 ; Slovenian Research Agency - Slovenia ; Comunidad de Madrid Instituto de Salud Carlos III ; European Union (EU) ; Spanish Government ; Xunta de Galicia ; European Community 7th Framework Program, Spain FP7-PEOPLE-2012-IEF-328826 ; Science & Technology Facilities Council (STFC) ; United States Department of Energy (DOE) DE-AC02-07CH11359 DE-FR02-04ER41300 DE-FG02-99ER41107 DE-SC0011689 ; National Science Foundation (NSF) 0450696 ; Grainger Foundation, USA ; National Foundation for Science & Technology Development (NAFOSTED) ; European Union (EU) PIRSES-2009-GA-246806 ; UNESCO ; MSMT-CR LG13007 ; 7AMB14AR005 ; CZ.1.05/2.1.00/03.0058
