Constraints on the CKM angle gamma from B(+/-) -> Dh(+/-) decays using D -> h(+/-)h '(-/+)pi(0) final states

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doi:10.1007/JHEP07(2022)099

A data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb(-1) is used to measure eleven CP violation observables in B-+/- -> Dh(+/-) decays, where h is either a kaon or a pion. The neutral D meson decay is reconstructed in the three-body final states: K-+/-pi(-/+)pi(0); pi(+)pi(-)pi(0); K+ K- pi(0) and the suppressed pi K-+(-/+)pi(0) combination. The mode where a large CP asymmetry is expected, B-+/- -> [K-+/-pi(-/+)pi(0)] K-D(+/-), is observed with a significance greater than seven standard deviations. The ratio of the partial width of this mode relative to that of the favoured mode, B-+/- -> [K-+/-pi(-/+)pi(0)] K-D(+/-), is R-ADS(K) = (1.27 +/- 0.16 +/- 0.02) x 10(-2). Evidence for a large CP asymmetry is also seen: A(ADS(K)) = - 0.38 +/- 0.12 +/- 0.02. Constraints on the CKM angle gamma are calculated from the eleven reported observables.

Aaij, R., Abdelmotteleb, A., Beteta, C.a., Gallego, F., Ackernley, T., Adeva, B., et al. (2022). Constraints on the CKM angle gamma from B(+/-) -> Dh(+/-) decays using D -> h(+/-)h '(-/+)pi(0) final states. JOURNAL OF HIGH ENERGY PHYSICS(7) [10.1007/JHEP07(2022)099].