Resonances and CP violation in Bs0and B¯s0→J/ψK+K−decays in the mass region above the ϕ(1020)

Bonivento W.;Bursche A.;Chen S.;Contu A.;Dettori F.;Manca G.;Oldeman R.;Saitta B.;
2017-01-01

Abstract

The decays of Bs0and B¯s0 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, ϕs, the decay width, Γs, and the width difference between light and heavy mass eigenstates, ΔΓs. A decay-time dependent amplitude analysis is employed. The data sample corresponds to an integrated luminosity of 3 fb−1produced in 7 and 8 TeV pp collisions at the LHC, collected by the LHCb experiment. The measurement determines ϕs= 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 ϕs= 1 ± 37 mrad, consistent with the Standard Model prediction.[Figure not available: see fulltext.]
2017
Inglese
2017
8
37
Comitato scientifico
internazionale
scientifica
B physics
CP violation
Hadron-Hadron scattering (experiments)
Spectroscopy
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alv ...espandi
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
776
open
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