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Resonances and CP violation in Bs0 and B¯s0→J/ψK+K− decays in the mass region above the ϕ(1020)
- The LHCb collaboration;
- Aaij, R;
- Adeva, B;
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Published Web Location
http://doi.org/10.1007/JHEP08(2017)037No data is associated with this publication.
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.]