Measurements of CP observables in B±→D(∗)K± and B±→D(∗)π± decays are presented, where D(∗) indicates a neutral D or D∗ meson that is an admixture of D(∗)0 and D¯(∗)0 states. Decays of the D∗ meson to the Dπ0 and Dγ final states are partially reconstructed without inclusion of the neutral pion or photon, resulting in distinctive shapes in the B candidate invariant mass distribution. Decays of the D meson are fully reconstructed in the K±π∓, K+K− and π+π− final states. The analysis uses a sample of charged B mesons produced in pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 2.0, 1.0 and 2.0 fb−1 taken at centre-of-mass energies of s√ = 7, 8 and 13 TeV, respectively. The study of B±→D∗K± and B±→D∗π± decays using a partial reconstruction method is the first of its kind, while the measurement of B±→DK± and B±→Dπ± decays is an update of previous LHCb measurements. The B±→DK± results are the most precise to date.
Measurement of CP observables in B ± → D (⁎) K ± and B ± → D (⁎) π ± decays
Calabrese, R.;Capriotti, L.;Fiorini, M.;Luppi, E.;Minzoni, L.;Pappalardo, L. L.;Tomassetti, L.;
2018
Abstract
Measurements of CP observables in B±→D(∗)K± and B±→D(∗)π± decays are presented, where D(∗) indicates a neutral D or D∗ meson that is an admixture of D(∗)0 and D¯(∗)0 states. Decays of the D∗ meson to the Dπ0 and Dγ final states are partially reconstructed without inclusion of the neutral pion or photon, resulting in distinctive shapes in the B candidate invariant mass distribution. Decays of the D meson are fully reconstructed in the K±π∓, K+K− and π+π− final states. The analysis uses a sample of charged B mesons produced in pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 2.0, 1.0 and 2.0 fb−1 taken at centre-of-mass energies of s√ = 7, 8 and 13 TeV, respectively. The study of B±→D∗K± and B±→D∗π± decays using a partial reconstruction method is the first of its kind, while the measurement of B±→DK± and B±→Dπ± decays is an update of previous LHCb measurements. The B±→DK± results are the most precise to date.File | Dimensione | Formato | |
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