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Measurement of the ratio B(B-s(0) -> J/psi f(0)(980))/B(B-s(0) -> J/psi phi(1020)) in pp collisions at root s=7 TeV

Abstract: A measurement of the ratio of the branching fractions of the B0smeson to J/?f0(980) and to J/?f(1020) is presented. The J/?, f0(980), and f(1020) are observed through their decays to µ+µ-, p+p-, and K+K-, respectively. The f0and the f are identified by requiring |Mp+p--974MeV| <50MeV and |MK+K--1020MeV| <10MeV. The analysis is based on a data sample of pp collisions at a centre-of-mass energy of 7TeV, collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 5.3fb-1. The measured ratio is B(B0s?J/?f0)B(f0?p+p-)B(B0s?J/?f)B(f?K+K-)=0.140 ±0.008 (stat) ±0.023 (syst), where the first uncertainty is statistical and the second is systematic.

Fuente: Physics Letters B, Vol. 756, Pp. 84–102, 2016

Publisher: Elsevier

Publication date: 01/05/2016

No. of pages: 19

Publication type: Article

DOI: 10.1016/j.physletb.2016.02.047

ISSN: 0370-2693,1873-2445

Spanish project: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

Publication Url: https://doi.org/10.1016/j.physletb.2016.02.047

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