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Measurements of the production of P-wave charmonium states through radiative decays at the ATLAS experiment
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SYSNO ASEP 0522707 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Measurements of the production of P-wave charmonium states through radiative decays at the ATLAS experiment Author(s) Marčišovský, Michal (FZU-D) RID, ORCID Number of authors 1 Article number 00082 Source Title EPJ Web of Conferences, 71 - 2nd International Conference on New Frontiers in Physics. - Les Ulis : E D P Sciences, 2014 / Bravina L. ; Foka Y. ; Kabana S. - ISSN 2100-014X Pages s. 1-8 Number of pages 8 s. Publication form Online - E Action International Conference on New Frontiers in Physics /2./ Event date 28.08.2013 - 05.09.2013 VEvent location Kolymbari Country GR - Greece Event type WRD Language eng - English Country FR - France Keywords ATLAS ; CERN LHC Coll ; B+:branching ratio: measured Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics R&D Projects LG13009 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000342375000082 EID SCOPUS 84901467365 DOI https://doi.org/10.1051/epjconf/20147100082 Annotation The production cross sections of the chi_c1 and chi_c2 charmonium states are measured in pp collisions at s**(1/2) = 7 TeV using 4.5 fb^-1 of integrated luminosity recorded by the ATLAS detector at the LHC. The chi_c states are reconstructed via the radiative decay chi_c -> J/psi(mu^+mu^-)gamma, where the photons are reconstructed using gamma -> e^+ e^- conversion in the detector material. Differential production cross sections for prompt and non-prompt chi_c1,2 are presented, as well as the fraction of inclusive J/psi produced by feed-down from the chi_c states. The results are compared with a range of theoretical predictions. The branching fraction of ℬ (B^+ -> chi_c1K^+) is measured using the same dataset and chi_c event selection.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2020
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