Study of the B+→J/ψΛ¯p$$ {\mathrm{B}}^{+}\to \mathrm{J}/\uppsi \overline{\Lambda}\mathrm{p} $$ decay in proton-proton collisions at s$$ \sqrt{s} $$ = 8 TeV
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
A study of the B+→J/ψΛ¯¯¯¯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/ψΛ¯¯¯¯, J/ψp, and Λ¯¯¯¯p systems produced in the B+→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¯¯¯¯p system.
Date Issued
2019-12
Date Acceptance
2019-11-13
Citation
The Journal of High Energy Physics, 2019, 2019 (12), pp.1-37
ISSN
1029-8479
Publisher
Springer Verlag (Germany)
Start Page
1
End Page
37
Journal / Book Title
The Journal of High Energy Physics
Volume
2019
Issue
12
Copyright Statement
This article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited (https://creativecommons.org/licenses/by/4.0/).
Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited (https://creativecommons.org/licenses/by/4.0/).
Identifier
https://link.springer.com/article/10.1007%2FJHEP12%282019%29100
Subjects
0105 Mathematical Physics
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
0206 Quantum Physics
Nuclear & Particles Physics
Publication Status
Published
Article Number
100
Date Publish Online
2019-12-12