A study of Λb0 baryon decays to the D p K− final state is presented based on a proton-proton collision data sample corresponding to an integrated luminosity of 9 fb^−1 collected with the LHCb detector. Two Λb0 decays are considered, Λb0 → D p K− with D → K− π+ and D → K+ π −, where D represents a superposition of D0 and anti-D0 states. The latter process is expected to be suppressed relative to the former, and is observed for the first time. The ratio of branching fractions of the two decays is measured, and the CP asymmetry of the suppressed mode, which is sensitive to the Cabibbo-Kobayashi-Maskawa angle γ, is also reported.

Aaij, R., Abdelmotteleb, A., Abellán Beteta, C., Abudinen Gallego, F., Ackernley, T., Adeva, B., et al. (2021). Observation of the Suppressed Λ0b → D p K− Decay with D → K+ π− and Measurement of its CP Asymmetry. PHYSICAL REVIEW D, 104(11), 1-14 [10.1103/PhysRevD.104.112008].

Observation of the Suppressed Λ0b → D p K− Decay with D → K+ π− and Measurement of its CP Asymmetry

Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Pisani, F.;Villa, A.;Zucchelli, S.;
2021

Abstract

A study of Λb0 baryon decays to the D p K− final state is presented based on a proton-proton collision data sample corresponding to an integrated luminosity of 9 fb^−1 collected with the LHCb detector. Two Λb0 decays are considered, Λb0 → D p K− with D → K− π+ and D → K+ π −, where D represents a superposition of D0 and anti-D0 states. The latter process is expected to be suppressed relative to the former, and is observed for the first time. The ratio of branching fractions of the two decays is measured, and the CP asymmetry of the suppressed mode, which is sensitive to the Cabibbo-Kobayashi-Maskawa angle γ, is also reported.
2021
Aaij, R., Abdelmotteleb, A., Abellán Beteta, C., Abudinen Gallego, F., Ackernley, T., Adeva, B., et al. (2021). Observation of the Suppressed Λ0b → D p K− Decay with D → K+ π− and Measurement of its CP Asymmetry. PHYSICAL REVIEW D, 104(11), 1-14 [10.1103/PhysRevD.104.112008].
Aaij, R.; Abdelmotteleb, A.S.W.; Abellán Beteta, C.; Abudinen Gallego, F.J.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/849428
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