Observation and measurements of the production of prompt and non-prompt JψJψ mesons in association with a ZZ boson in pppp collisions at s√=8TeVs√=8TeV with the ATLAS detector

Abstract

Altres ajuts: We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of EPLANET, ERC and NSRF, European Union and MINECO, PIC, Spain. Funded by SCOAP3. ; The production of a boson in association with a meson in proton-proton collisions probes the production mechanisms of quarkonium and heavy flavour in association with vector bosons, and allows studies of multiple parton scattering. Using of data collected with the ATLAS experiment at the LHC in collisions at , the first measurement of associated production is presented for both prompt and non-prompt production, with both signatures having a significance in excess of . The inclusive production cross-sections for boson production (analysed in or decay modes) in association with prompt and non-prompt are measured relative to the inclusive production rate of bosons in the same fiducial volume to be and respectively. Normalised differential production cross-section ratios are also determined as a function of the transverse momentum. The fraction of signal events arising from single and double parton scattering is estimated, and a lower limit of at confidence level is placed on the effective cross-section regulating double parton interactions.