Measurements of CP observables in B±âD(â)K±and B±âD(â)ϱdecays are presented, where D(â)indicates a neutral D or Dâmeson that is an admixture of D(â)0and D¯(â)0states. Decays of the Dâmeson to the DÏ0and 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±Ïâ, K+Kâand Ï+Ïâfinal 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 fbâ1taken at centre-of-mass energies of s=7, 8 and 13 TeV, respectively. The study of B±âDâK±and B±âDâϱdecays using a partial reconstruction method is the first of its kind, while the measurement of B±âDK±and B±âDϱdecays is an update of previous LHCb measurements. The B±âDK±results are the most precise to date.
Measurement of CP observables in B± → D(⁎)K± and B± → D(⁎)π± decays
De Serio, M.;Pappagallo, M.;
2018-01-01
Abstract
Measurements of CP observables in B±âD(â)K±and B±âD(â)ϱdecays are presented, where D(â)indicates a neutral D or Dâmeson that is an admixture of D(â)0and D¯(â)0states. Decays of the Dâmeson to the DÏ0and 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±Ïâ, K+Kâand Ï+Ïâfinal 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 fbâ1taken at centre-of-mass energies of s=7, 8 and 13 TeV, respectively. The study of B±âDâK±and B±âDâϱdecays using a partial reconstruction method is the first of its kind, while the measurement of B±âDK±and B±âDϱdecays is an update of previous LHCb measurements. The B±âDK±results are the most precise to date.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.