Study of the B+ -˃ J/psi(Lambda)over-barp decay in proton-proton collisions at root s=8 TeV
- Title
- Study of the B+ -˃ J/psi(Lambda)over-barp decay in proton-proton collisions at root s=8 TeV
- Author
- 김태정
- Keywords
- B physics; Hadron-Hadron scattering (experiments)
- Issue Date
- 2019-12
- Publisher
- SPRINGER
- Citation
- JOURNAL OF HIGH ENERGY PHYSICS, no. 12, article no. 100
- Abstract
- A study of the B+-˃ J/psi = 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+-˃ J/psi B+-˃ J/psi K is measured to be (1.054 +/- 0.057(stat) +/- 0.035(syst) +/- 0.011 where the last uncertainty reflects the uncertainties in the world-average branching fractions of and K*(892) (+) decays to reconstructed final states. The invariant mass distributions of the J/psi, J/psi systems produced in the B+-˃ J/psi 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 (Lambda) over barp system.
- URI
- https://link.springer.com/article/10.1007%2FJHEP12%282019%29100https://repository.hanyang.ac.kr/handle/20.500.11754/157918
- ISSN
- 1029-8479
- DOI
- 10.1007/JHEP12(2019)100
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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