Resonances and CP violation in B and $$ {\overline{B}}_s^0\to J/\psi {K}^{+}{K}^{-} $$ decays in the mass region above the ϕ(1020).

The decays of B 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 , the decay width, Γ, and the width difference between light and heavy mass eigenstates, ΔΓ. A decay-time dependent amplitude analysis is employed. The data sample corresponds to an integrated luminosity of 3 fb produced in 7 and 8 TeV pp collisions at the LHC, collected by the LHCb experiment. The measurement determines ϕ = 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 = 1 ± 37 mrad, consistent with the Standard Model prediction. [ABSTRACT FROM AUTHOR]