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.]

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
B physics
CP violation
Hadron-Hadron scattering (experiments)
Spectroscopy
File in questo prodotto:
File Dimensione Formato  
JHEP08(2017)037.pdf

accesso aperto

Tipologia: versione editoriale
Dimensione 1.17 MB
Formato Adobe PDF
1.17 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/303035
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 39
  • ???jsp.display-item.citation.isi??? 39
social impact