A study of Λb0 and Ξb0 baryon decays to the final states p K0S π− and p K0S K− is performed using pp collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb^−1. The decays Λb0 → p K0S K− and Ξb0 → p K0S K− are observed for the first time, with significances reaching eight standard deviations. The branching fractions and integrated CP asymmetries are measured for the Λb0 → p K0S π−, Λb0 → p K0S K−, and Ξb0 → p K0S K− decays. For the decay Λb0 → p K0S π−, the CP asymmetries are measured in different regions of the Dalitz plot. No evidence of CP violation is observed.

Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A.A., et al. (2025). Measurement of branching fractions and CP asymmetries in Λb0 (Ξb0) → p K0S h− decays. JOURNAL OF HIGH ENERGY PHYSICS, 2025(10), 0-27 [10.1007/jhep10(2025)169].

Measurement of branching fractions and CP asymmetries in Λb0 (Ξb0) → p K0S h− decays

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;Zenesini, F.;
2025

Abstract

A study of Λb0 and Ξb0 baryon decays to the final states p K0S π− and p K0S K− is performed using pp collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb^−1. The decays Λb0 → p K0S K− and Ξb0 → p K0S K− are observed for the first time, with significances reaching eight standard deviations. The branching fractions and integrated CP asymmetries are measured for the Λb0 → p K0S π−, Λb0 → p K0S K−, and Ξb0 → p K0S K− decays. For the decay Λb0 → p K0S π−, the CP asymmetries are measured in different regions of the Dalitz plot. No evidence of CP violation is observed.
2025
Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A.A., et al. (2025). Measurement of branching fractions and CP asymmetries in Λb0 (Ξb0) → p K0S h− decays. JOURNAL OF HIGH ENERGY PHYSICS, 2025(10), 0-27 [10.1007/jhep10(2025)169].
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adefisoye, A. A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapopoul...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1036265
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