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± → D h± decays, where h is either a kaon or a pion. The neutral D meson decay is reconstructed in the three-body final states: K± π∓ π0; π+ π− π0; K+ K− π0 and the suppressed π± K∓ π0 combination. The mode where a large CP asymmetry is expected, B± → [π± K∓ π0]_D K±, 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± π∓ π0]_D K±, is R_ADS(K) = (1.27 ± 0.16 ± 0.02) × 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 γ are calculated from the eleven reported observables.

Aaij, R., Abdelmotteleb, A., Abellán Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2022). Constraints on the CKM Angle γ from B± → D h± Decays Using D → h± h′∓ π0 Final States. JOURNAL OF HIGH ENERGY PHYSICS, 2022(7), 0-23 [10.1007/JHEP07(2022)099].

Constraints on the CKM Angle γ from B± → D h± Decays Using D → h± h′∓ π0 Final States

Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Villa, A.;Zucchelli, S.;
2022

Abstract

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± → D h± decays, where h is either a kaon or a pion. The neutral D meson decay is reconstructed in the three-body final states: K± π∓ π0; π+ π− π0; K+ K− π0 and the suppressed π± K∓ π0 combination. The mode where a large CP asymmetry is expected, B± → [π± K∓ π0]_D K±, 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± π∓ π0]_D K±, is R_ADS(K) = (1.27 ± 0.16 ± 0.02) × 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 γ are calculated from the eleven reported observables.
2022
Aaij, R., Abdelmotteleb, A., Abellán Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2022). Constraints on the CKM Angle γ from B± → D h± Decays Using D → h± h′∓ π0 Final States. JOURNAL OF HIGH ENERGY PHYSICS, 2022(7), 0-23 [10.1007/JHEP07(2022)099].
Aaij, R.; Abdelmotteleb, A.S.W.; Abellán Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C.A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/900676
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