A measurement of CP-violating observables in B± → D∗K± and B± → D∗π± decays is made where the photon or neutral pion from the D∗ → Dγ or D∗ → Dπ0 decay is not reconstructed. The D meson is reconstructed in the self-conjugate decay modes, D → K0Sπ+π− or D → K0 SK+K−. The distribution of signal yields in the D decay phase space is analysed in a model-independent way. The measurement uses a data sample collected in proton-proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of approximately 9 fb−1. The B± → D∗K± and B± → D∗π± CP-violating observables are interpreted in terms of hadronic parameters and the CKM angle γ, resulting in a measurement of γ = (92+21−17)◦. The total uncertainty includes the statistical and systematic uncertainties, and the uncertainty due to external strong-phase inputs
A model-independent measurement of the CKM angle gamma in partially reconstructed B\pm -> D*h\pm decays with D -> KS0h+h- (h = pi, K)
Bassi G.;Kleijne N.Membro del Collaboration Group
;Morello M. J.Membro del Collaboration Group
;Passaro D.Membro del Collaboration Group
;Pica L.Membro del Collaboration Group
;Ribatti R.Membro del Collaboration Group
;Riccardi D.Membro del Collaboration Group
;
2024
Abstract
A measurement of CP-violating observables in B± → D∗K± and B± → D∗π± decays is made where the photon or neutral pion from the D∗ → Dγ or D∗ → Dπ0 decay is not reconstructed. The D meson is reconstructed in the self-conjugate decay modes, D → K0Sπ+π− or D → K0 SK+K−. The distribution of signal yields in the D decay phase space is analysed in a model-independent way. The measurement uses a data sample collected in proton-proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of approximately 9 fb−1. The B± → D∗K± and B± → D∗π± CP-violating observables are interpreted in terms of hadronic parameters and the CKM angle γ, resulting in a measurement of γ = (92+21−17)◦. The total uncertainty includes the statistical and systematic uncertainties, and the uncertainty due to external strong-phase inputs| File | Dimensione | Formato | |
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JHEP02(2024)118.pdf
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