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Title: Resonances and CP violation in B s 0 and {\overline{B}}_s^0\to J/ψ {K}+{K}- decays in the mass region above the ϕ(1020)
Author: Camboni, Alessandro
Coquereau, S.
Fernandez, G.
Garrido Beltrán, Lluís
Gascon, D.
Graciani Diaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Picatoste Olloqui, E.
Rives Molina, V.
Sanchez Gonzalo, D.
LHCb Collaboration
Keywords: Hadrons
Gran Col·lisionador d'Hadrons
Física de partícules
Large Hadron Collider (France and Switzerland)
Particle physics
Issue Date: Aug-2017
Publisher: Springer Verlag
Abstract: The decays of B s 0 and {\overline{B}}_s^0 mesons into the J/ψK + K - final state are studied in the K + K - mass region above the ϕ(1020) meson in order to determine the resonant substructure and measure the CP-violating phase, ϕ s , the decay width, Γ s , and the width difference between light and heavy mass eigenstates, ΔΓ s . A decay-time dependent amplitude analysis is employed. The data sample corresponds to an integrated luminosity of 3 fb-1 produced in 7 and 8 TeV pp collisions at the LHC, collected by the LHCb experiment. The measurement determines ϕ s = 119 ± 107 ± 34 mrad. A combination with previous LHCb measurements using similar decays into the J/ψπ + π - and J/ψϕ(1020) final states gives ϕ s = 1 ± 37 mrad, consistent with the Standard Model prediction.
Note: Reproducció del document publicat a:
It is part of: Journal of High Energy Physics, 2017, vol. 2017, num. 37, p. 1-28
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ISSN: 1126-6708
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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