Measurement of the CKM angle γ using the B ± → D * h ± channels

The LHCb collaboration

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Resumen

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 (D 0 and D¯) states and is reconstructed through the decay chains D * → Dπ 0 /γ and D→KS0π+π−/KS0K+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 (69−14+13)∘ using the measured CP-violating observables. The hadronic parameters rBD∗K±,rBD∗π±,δBD∗K±,δBD∗π± , which are the ratios and strong phase differences between favoured and suppressed B ± decays, are also reported. [Figure not available: see fulltext.]

Idioma originalInglés
Número de artículo13
PublicaciónJournal of High Energy Physics
Volumen2023
N.º12
DOI
EstadoPublicada - dic 2023

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