A study of Λ 0 b and Ξ 0 b baryon decays to the final states pK0 S π − and pK0 SK− is performed using pp collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1 . The decays Λ 0 b → pK0 SK− and Ξ 0 b → pK0 SK− are observed for the first time, with significances reaching eight standard deviations. The branching fractions and integrated CP asymmetries are measured for the Λ 0 b → pK0 S π −, Λ 0 b → pK0 SK−, and Ξ 0 b → pK0 SK− decays. For the decay Λ 0 b → pK0 S π −, the CP asymmetries are measured in different regions of the Dalitz plot. No evidence of CP violation is observed.
Measurement of branching fractions and CP asymmetries in $$ {\varLambda}_b^0\left({\varXi}_b^0\right)\to p{K}_{\textrm{S}}^0{h}^{-} $$ decays
De Angelis, C.;Dettori, F.;Fabiano, F.;Litvinov, R.;Manca, G.;Oldeman, R.;Provenzano, D.;Saitta, B.;
2025-01-01
Abstract
A study of Λ 0 b and Ξ 0 b baryon decays to the final states pK0 S π − and pK0 SK− is performed using pp collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1 . The decays Λ 0 b → pK0 SK− and Ξ 0 b → pK0 SK− are observed for the first time, with significances reaching eight standard deviations. The branching fractions and integrated CP asymmetries are measured for the Λ 0 b → pK0 S π −, Λ 0 b → pK0 SK−, and Ξ 0 b → pK0 SK− decays. For the decay Λ 0 b → pK0 S π −, the CP asymmetries are measured in different regions of the Dalitz plot. No evidence of CP violation is observed.| File | Dimensione | Formato | |
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JHEP10(2025)169.pdf
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