Study of the B+→J/ψΛ¯pB+→J/ψΛ¯p decay in proton-proton collisions at √s = 8 TeV; Journal of High Energy Physics; Vol. 2019, iss. 12

Bibliografiska uppgifter
Parent link:Journal of High Energy Physics
Vol. 2019, iss. 12.— 2019.— [100, 37 p.]
Institutionella upphovsmän: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Научно-производственная лаборатория "Импульсно-пучковых, электроразрядных и плазменных технологий"
Övriga upphovsmän: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Bergauer T. Thomas, Babaev A. A. Anton Anatoljevich, Yuzhakov A. D. Aleksandr Dmitrievich, Okhotnikov V. V. Vitaly Vladimirovich
Sammanfattning:Title screen
A study of the B+→J/ψΛ¯¯¯¯pB+→J/ψΛ¯p decay using proton-proton collision data collected at s√s = 8 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 19.6 fb−1, is presented. The ratio of branching fractions B(B+→J/ψΛ¯¯¯¯p)/B(B+→J/ψK∗(892)+)B(B+→J/ψΛ¯p)/B(B+→J/ψK∗(892)+) is measured to be (1.054 ± 0.057(stat) ± 0.035(syst) ± 0.011(BB))%, where the last uncertainty reflects the uncertainties in the world-average branching fractions of Λ¯¯¯¯Λ¯ and K*(892) + decays to reconstructed final states. The invariant mass distributions of the J/ψΛ¯¯¯¯J/ψΛ¯, J/ψp, and Λ¯¯¯¯pΛ¯p systems produced in the B+→J/ψΛ¯¯¯¯pB+→J/ψΛ¯p decay are investigated and found to be inconsistent with the pure phase space hypothesis. The analysis is extended by using a model-independent angular amplitude analysis, which shows that the observed invariant mass distributions are consistent with the contributions from excited kaons decaying to the Λ¯¯¯¯pΛ¯p system.
Режим доступа: по договору с организацией-держателем ресурса
Språk:engelska
Publicerad: 2019
Ämnen:
Länkar:https://doi.org/10.1007/JHEP12(2019)100
Materialtyp: Elektronisk Bokavsnitt
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662401

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