Study of the B+→J/ψΛ¯pB+→J/ψΛ¯p decay in proton-proton collisions at √s = 8 TeV
| Parent link: | Journal of High Energy Physics Vol. 2019, iss. 12.— 2019.— [100, 37 p.] |
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| Autor corporatiu: | , |
| Altres autors: | , , , , , , , |
| Sumari: | 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 |
| Idioma: | anglès |
| Publicat: |
2019
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| Matèries: | |
| Accés en línia: | https://doi.org/10.1007/JHEP12(2019)100 |
| Format: | Electrònic Capítol de llibre |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662401 |