A measurement of the CP-violating observables from B± → D∗K± and B± →D∗π± decays is presented, where D∗ (D) is an admixture of D∗0 and D¯ ∗0(D0 and D¯ 0) states and is reconstructed through the decay chains D∗ → Dπ0/γ and D → K0 Sπ +π −/K0 SK+K−. The measurement is performed by analysing the signal yield variation across the D decay phase space and is independent of any amplitude model. The data sample used was collected by the LHCb experiment in proton-proton collisions and corresponds to a total integrated luminosity of 9 fb−1 at centre-of-mass energies of 7, 8 and 13 TeV. The CKM angle γ is determined to be (69+13−14) using the measured CP-violating observables. The hadronic parameters r D∗K± B , rD∗π± B , δD∗K±B , δD∗π± B , which are the ratios and strong phase differences between favoured and suppressed B± decays, are also reported.
(2023). Measurement of the CKM angle γ using the B± → D*h± channels [journal article - articolo]. In JOURNAL OF HIGH ENERGY PHYSICS. Retrieved from https://hdl.handle.net/10446/264080 Retrieved from https://hdl.handle.net/10446/264080
Measurement of the CKM angle γ using the B± → D*h± channels
A. Lupato;F. Redi;
2023-01-01
Abstract
A measurement of the CP-violating observables from B± → D∗K± and B± →D∗π± decays is presented, where D∗ (D) is an admixture of D∗0 and D¯ ∗0(D0 and D¯ 0) states and is reconstructed through the decay chains D∗ → Dπ0/γ and D → K0 Sπ +π −/K0 SK+K−. The measurement is performed by analysing the signal yield variation across the D decay phase space and is independent of any amplitude model. The data sample used was collected by the LHCb experiment in proton-proton collisions and corresponds to a total integrated luminosity of 9 fb−1 at centre-of-mass energies of 7, 8 and 13 TeV. The CKM angle γ is determined to be (69+13−14) using the measured CP-violating observables. The hadronic parameters r D∗K± B , rD∗π± B , δD∗K±B , δD∗π± B , which are the ratios and strong phase differences between favoured and suppressed B± decays, are also reported.File | Dimensione del file | Formato | |
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