Resonances and $CP$ violation in $B_s^0$ and $øverlineB_s^0 \to J/ψ K^+K^-$ decays in the mass region above the $φ(1020)$статья
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Дата последнего поиска статьи во внешних источниках: 17 октября 2017 г.
Аннотация:The decays of B0s and B¯¯¯¯0s 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 3fb−1 produced in 7 and 8 Tev pp collisions at the LHC, collected by the LHCb experiment. The measurement determines ϕs=119±107±34mrad. A combination with previous LHCb measurements using similar decays into the J/ψπ+π− and J/ψϕ(1020) final states gives ϕs=1±37mrad, consistent with the Standard Model prediction.