A comprehensive study of the angular distributions in the bottom-baryon decays Λ0b → Λc+ h− (h = π,K), followed by Λc+ → Λ h+ with Λ → p π− or Λc+ → p K0S decays, is performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of 9 fb^−1 collected by the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. The decay parameters and the associated charge-parity (CP) asymmetries are measured, with no significant CP violation observed. For the first time, the Λ0b → Λc+ h− decay parameters are measured. The most precise measurements of the decay parameters α,β and γ are obtained for Λc+ decays and an independent measurement of the decay parameters for the strange-baryon Λ decay is provided. The results deepen our understanding of weak decay dynamics in baryon decays.

Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. A., et al. (2024). Measurement of Λ0b, Λc+ and Λ Decay Parameters Using Λ0b → Λc+ h− Decays. PHYSICAL REVIEW LETTERS, 133(26), 1-15 [10.1103/physrevlett.133.261804].

Measurement of Λ0b, Λc+ and Λ Decay Parameters Using Λ0b → Λc+ h− Decays

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;
2024

Abstract

A comprehensive study of the angular distributions in the bottom-baryon decays Λ0b → Λc+ h− (h = π,K), followed by Λc+ → Λ h+ with Λ → p π− or Λc+ → p K0S decays, is performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of 9 fb^−1 collected by the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. The decay parameters and the associated charge-parity (CP) asymmetries are measured, with no significant CP violation observed. For the first time, the Λ0b → Λc+ h− decay parameters are measured. The most precise measurements of the decay parameters α,β and γ are obtained for Λc+ decays and an independent measurement of the decay parameters for the strange-baryon Λ decay is provided. The results deepen our understanding of weak decay dynamics in baryon decays.
2024
Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. A., et al. (2024). Measurement of Λ0b, Λc+ and Λ Decay Parameters Using Λ0b → Λc+ h− Decays. PHYSICAL REVIEW LETTERS, 133(26), 1-15 [10.1103/physrevlett.133.261804].
Aaij, R.; Abdelmotteleb, A.  S.  W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adefisoye, A.  A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapop...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1002229
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