Publication: Study of the B +→ J / ψ Λ ¯ p decay in proton-proton collisions at √s = 8 TeV
Дата
2019
Авторы
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Matveev, V.
Chistov, R.
Danilov, M.
Nigamova, A.
Parygin, P.
Polikarpov, S.
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Volume Title
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Аннотация
© 2019, The Author(s).A study of the B +→ J / ψ Λ ¯ p decay using proton-proton collision data collected at 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)+) is measured to be (1.054 ± 0.057(stat) ± 0.035(syst) ± 0.011(B))%, where the last uncertainty reflects the uncertainties in the world-average branching fractions of Λ ¯ and K*(892) + decays to reconstructed final states. The invariant mass distributions of the J / ψ Λ ¯ , J/ψp, and Λ ¯ p systems produced in the B +→ J / ψ Λ¯ 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 ¯ p system. [Figure not available: see fulltext.]
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Study of the B +→ J / ψ Λ ¯ p decay in proton-proton collisions at √s = 8 TeV / Sirunyan, A.M. [et al.] // Journal of High Energy Physics. - 2019. - 2019. - № 12. - 10.1007/JHEP12(2019)100
URI
https://www.doi.org/10.1007/JHEP12(2019)100
https://www.scopus.com/record/display.uri?eid=2-s2.0-85076606991&origin=resultslist
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https://openrepository.mephi.ru/handle/123456789/19030
https://www.scopus.com/record/display.uri?eid=2-s2.0-85076606991&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000511707900001
https://openrepository.mephi.ru/handle/123456789/19030