Search for CP violation using triple product asymmetries in Lb->pK-pi+pi-, Lb->pK-K+K- and Xib0->pK-K-pi+ decays

A search for CP and P violation using triple-product asymmetries is performed with Λb→ pK−π+π−, Λb→ pK−K+K− and Ξ0 b → 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 Λb → pKχc0(1P )(→ π+π−,K+K−) decay is also reported. Published in JHEP 08 (2018) 039 c © 2018 CERN for the benefit of the LHCb collaboration. CC-BY-4.0 licence. †Authors are listed at the end of this paper. ar X iv :1 80 5. 03 94 1v 3 [ he pex ] 2 0 A ug 2 01 8