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Abstract: The CP-violating weak phase ?s of the Bs0 meson and the decay width difference ??s of the Bs0 light and heavy mass eigenstates are measured with the CMS detector at the LHC using a data sample of Bs0?J/??(1020)??+?-K+K- decays. The analysed data set corresponds to an integrated luminosity of 19.7fb-1 collected in pp collisions at a centre-of-mass energy of 8TeV. A total of 49 200 reconstructed Bs0 decays are used to extract the values of ?s and ??s by performing a time-dependent and flavour-tagged angular analysis of the ?+?-K+K- final state. The weak phase is measured to be ?s=-0.075±0.097(stat)±0.031(syst) rad, and the decay width difference is ??s=0.095±0.013(stat)±0.007(syst) ps-1.
Fuente: Physics Letters B, Vol.757, Pp. 97?120 (2016)
Publisher: Elsevier
Publication date: 01/06/2016
No. of pages: 24
Publication type: Article
DOI: 10.1016/j.physletb.2016.03.046
ISSN: 0370-2693,1873-2445
Publication Url: https://doi.org/10.1016/j.physletb.2016.03.046
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KHACHATRYAN, VLADIMIR
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
JUAN RAMON CASTIÑEIRAS DE SAA
PABLO DE CASTRO MANZANO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
JUAN GARCIA FERRERO
GERVASIO GOMEZ GRAMUGLIO
MARIA AMPARO LOPEZ VIRTO
JESUS MARCO DE LUCAS
RAFAEL JOSE MARCO DE LUCAS
CELSO MARTINEZ RIVERO
FRANCISCO MATORRAS WEINIG
FRANCISCA JAVIELA MUÑOZ SANCHEZ
JONATAN PIEDRA GOMEZ
MARIA TERESA RODRIGO ANORO
ANA YAIZA RODRIGUEZ MARRERO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
IVAN VILA ALVAREZ
ROCIO VILAR CORTABITARTE
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