Search for CP violation using triple product asymmetries in Λ b 0 → pK − π + π − , Λ b 0 → pK − K + K − and Ξ b 0 → pK − K − π + decays

bstract A search for CP and P violation using triple-product asymmetries is performed with Λ b 0 → pK − π + π − , Λ b 0 → pK − K + K − and Ξ b 0 → pK − K − π + decays. The data sample corresponds to integrated luminosities of 1.0 fb −1 and 2.0 fb −1 , recorded with the LHCb detector at centre-of-mass energies of 7 TeV and 8 TeV, respectively. The CP - and P - violating asymmetries are measured both integrating over all phase space and in specific phase-space regions. No significant deviation from CP or P symmetry is found. The first observation of Λ b 0 → pK − χ c0 (1 P )(→ π + π − , K + K − ) decay is also reported.