2026-04-14T03:20:26Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1622982025-12-05T16:46:26Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917

Measurement of CP observables in the process B 0 → DK *0 with two- and four-body D decays LHCb Collaboration Alfonso Albero, Alejandro Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Gironella Gironell, Pere Graciani Díaz, Ricardo Graugés Pous, Eugeni Vilasis-Cardona, Xavier Marin Benito, Carla Hadrons Física de partícules Experiments Hadrons Particle physics Experiments Measurements of CP observables in B0 → DK∗0 decays are presented, where D represents a superposition of D0 and D¯¯¯¯0 states. The D meson is reconstructed in the two-body final states K+π−, π+K−, K+K− and π+π−, and, for the first time, in the fourbody final states K+π−π+π−, π+K−π+π− and π+π−π+π−. The analysis uses a sample of neutral B mesons produced in proton-proton collisions, corresponding to an integrated luminosity of 1.0, 2.0 and 1.8 fb−1 collected with the LHCb detector at centre-of-mass energies of s√=7,8 and 13 TeV, respectively. First observations of the decays B0 → D(π+K−)K∗0 and B0 → D(π+π−π+π−)K∗0 are obtained. The measured observables are interpreted in terms of the CP -violating weak phase γ. 2020-05-25T13:23:42Z 2020-05-25T13:23:42Z 2019-08-07 2020-05-25T13:23:42Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.1007/JHEP08(2019)041 Journal of High Energy Physics, 2019, p. 41 https://doi.org/10.1007/JHEP08(2019)041 info:eu-repo/grantAgreement/EC/H2020/792684/EU//pANUCSTR cc-by (c) LHCb Collaboration et al., 2019 http://creativecommons.org/licenses/by/3.0/es info:eu-repo/semantics/openAccess Springer Verlag Articles publicats en revistes (Física Quàntica i Astrofísica)