Measurement of the ratio B(B0s→J/ψf0(980))/B(B0s→J/ψφ(1020)) in pp collisions at √s=7Te

Khachatryan, Vladimir; Brochero Cifuentes, Javier Andrés; Cabrillo Bartolomé, José Iban; Calderón Tazón, Alicia; Duarte Campderros, Jorge; Fernández García, Marcos; Gómez Gramuglio, Gervasio; Graziano, Alberto; López Virto, María Amparo; Marco de Lucas, Jesús; Marco de Lucas, Rafael José; Martínez Rivero, Celso; Matorras Weinig, Francisco; Muñoz Sánchez, Francisca Javiela; Piedra Gómez, Jonatan; Rodrigo Anoro, Teresa; Rodríguez Marrero, Ana Yaiza; Ruiz Jimeno, Alberto; Scodellaro, Luca; Vila Álvarez, Iván; Vilar Cortabitarte, Rocío

doi:10.1016/j.physletb.2016.02.047

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Measurement of the ... (729.3Kb)

Identificadores

URI: http://hdl.handle.net/10902/13952

DOI: 10.1016/j.physletb.2016.02.047

ISSN: 0370-2693

ISSN: 1873-2445

; [et al.]

Fecha

2016-05

Derechos

Publicado en

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

Editorial

Elsevier

Enlace a la publicación

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

Resumen/Abstract

A measurement of the ratio of the branching fractions of the B0s meson to J/ψf0 (980) and to J/ψφ(1020) is presented. TheJ/ψ,f0(980),and φ(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 measu redratio is B(B0s→J/ψf0) B(f0→π+π−)B (B0s→J/ψφ) B(φ→K+K−) =0.140 ±0.008 (stat) ±0.023 (syst), where the first uncertainty is statistical and the second is systematic.

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