Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/133699
Title: Measurement of the CP-Violating Phase ϕs in the Decay B0s→J/ψϕ
Author: Abellan Beteta, Carlos
Calvo Gómez, Míriam
Camboni, Alessandro
Comerma Montells, Albert
Domingo Bonal, Francesc
Garrido Beltrán, Lluís
Gascón Fora, David
Grabalosa Gándara, Marc
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
López Asamar, Elias
Musy, Marco
Pérez-Calero Yzquierdo, Antonio
Picatoste Olloqui, Eduardo
Pie Valls, B. (Blai)
Potterat, Cédric
Puig Navarro, Albert
Roselló, M.
Ruiz, Hugo (Ruiz Pérez)
Vázquez Gómez, Ricard
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Experiments
Particle physics
Experiments
Issue Date: 7-Mar-2012
Publisher: American Physical Society
Abstract: We present a measurement of the time-dependent C P -violating asymmetry in B 0 s → J / ψ ϕ decays, using data collected with the LHCb detector at the LHC. The decay time distribution of B 0 s → J / ψ ϕ is characterized by the decay widths Γ H and Γ L of the heavy and light mass eigenstates, respectively, of the B 0 s − ¯¯¯ B 0 s system and by a C P -violating phase ϕ s . In a sample of about 8500 B 0 s → J / ψ ϕ events isolated from 0.37     fb − 1 of p p collisions at √ s = 7     TeV , we measure ϕ s = 0.15 ± 0.18 ( stat ) ± 0.06 ( syst )     rad . We also find an average B 0 s decay width Γ s ≡ ( Γ L + Γ H ) / 2 = 0.657 ± 0.009 ( stat ) ± 0.008 ( syst )     ps − 1 and a decay width difference Δ Γ s ≡ Γ L − Γ H = 0.123 ± 0.029 ( stat ) ± 0.011 ( syst )     ps − 1 . Our measurement is insensitive to the transformation ( ϕ s , Δ Γ s ) ↦ ( π − ϕ s , − Δ Γ s ) .
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.108.101803
It is part of: Physical Review Letters, 2012, vol. 108, num. 10, p. 101803
URI: http://hdl.handle.net/2445/133699
Related resource: https://doi.org/10.1103/PhysRevLett.108.101803
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Electrònica)
Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Física de la Matèria Condensada)

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