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Abstract: Measurements are presented of the lifetimes of the B 0, Bs0, ?b0, and Bc+ hadrons using the decay channels B0?J/?K?(892)0, B0?J/?KS0, Bs0?J/??+?-, Bs0?J/??(1020), ?b0?J/??0, and Bc+?J/??+. The data sample, corresponding to an integrated luminosity of 19.7fb-1, was collected by the CMS detector at the LHC in proton?proton collisions at s=8TeV. The B 0 lifetime is measured to be 453.0±1.6(stat)±1.8(syst)?m in J / ?K ?(892) 0and 457.8±2.7(stat)±2.8(syst)?m in J/?KS0, which results in a combined measurement of c?B0=454.1±1.4(stat)±1.7(syst)?m. The effective lifetime of the Bs0 meson is measured in two decay modes, with contributions from different amounts of the heavy and light eigenstates. This results in two different measured lifetimes: c?Bs0?J/??+?-=502.7±10.2(stat)±3.4(syst)?m and c?Bs0?J/??(1020)=443.9±2.0(stat)±1.5(syst)?m. The ?b0 lifetime is found to be 442.9±8.2(stat)±2.8(syst)?m. The precision from each of these channels is as good as or better than previous measurements. The Bc+ lifetime, measured with respect to the B + to reduce the systematic uncertainty, is 162.3±7.8(stat)±4.2(syst)±0.1(?B+)?m. All results are in agreement with current world-average values.
Fuente: European Physical Journal C, Vol. 78, Iss. 6, Art. Num. 457 (2018)
Editorial: Springer New York LLC
Fecha de publicación: 07/06/2018
Nº de páginas: 28
Tipo de publicación: Artículo de Revista
DOI: 10.1140/epjc/s10052-018-5929-3
ISSN: 1434-6044,1434-6052
Url de la publicación: https://doi.org/10.1140/epjc/s10052-018-5929-3
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SIRUNYAN, A. M.
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
BARBARA CHAZIN QUERO
ESTEBAN CURRAS RIVERA
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
JUAN GARCIA FERRERO
GERVASIO GOMEZ GRAMUGLIO
MARIA AMPARO LOPEZ VIRTO
JESUS MARCO DE LUCAS
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
NICOLO TREVISANI
IVAN VILA ALVAREZ
ROCIO VILAR CORTABITARTE
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