Аннотация:A search for CP and P violation using triple-product asymmetries is performed with Λ0b→pK−π+π−, Λ0b→pK−K+K− and Ξ0b→pK−K−π+ decays. The data sample corresponds to integrated luminosities of 1.0fb−1 and 2.0fb−1, recorded with the LHCb detector at centre-of-mass energies of 7TeV and 8TeV, 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 Λ0b→pK−χc0(1P)(→π+π−,K+K−) decay is also reported.