Measurement of branching fractions and CP asymmetries in $$ {\varLambda}_b^0\left({\varXi}_b^0\right)\to p{K}_{\textrm{S}}^0{h}^{-} $$ decays

A bstract A study of $$ {\Lambda}_b^0 $$ Λ b 0 and $$ {\Xi}_b^0 $$ Ξ b 0 baryon decays to the final states $$ p{K}_{\textrm{S}}^0{\pi}^{-} $$ p K S 0 π − and $$ p{K}_{\textrm{S}}^0{K}^{-} $$ p K S 0 K − is performed using pp collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb − 1 . The decays $$ {\Lambda}_b^0\to p{K}_{\textrm{S}}^0{K}^{-} $$ Λ b 0 → p K S 0 K − and $$ {\Xi}_b^0\to p{K}_{\textrm{S}}^0{K}^{-} $$ Ξ b 0 → p K S 0 K − are observed for the first time, with significances reaching eight standard deviations. The branching fractions and integrated CP asymmetries are measured for the $$ {\Lambda}_b^0\to p{K}_{\textrm{S}}^0{\pi}^{-} $$ Λ b 0 → p K S 0 π − , $$ {\Lambda}_b^0\to p{K}_{\textrm{S}}^0{K}^{-} $$ Λ b 0 → p K S 0 K − , and $$ {\Xi}_b^0\to p{K}_{\textrm{S}}^0{K}^{-} $$ Ξ b 0 → p K S 0 K − decays. For the decay $$ {\Lambda}_b^0\to p{K}_{\textrm{S}}^0{\pi}^{-} $$ Λ b 0 → p K S

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