Search for CP violation using triple product asymmetries in ${\Lambda }_b^0\to p{K}^{-}{\pi }^{+}{\pi }^{-}$, ${\Lambda }_b^0\to p{K}^{-}{K}^{+}{K}^{-}$ and ${\Xi }_b^0\to p{K}^{-}{K}^{-}{\pi }^{+}$ decays

Abstract

A search for $C$P and $P$ violation using triple-product asymmetries is performed with ${\Lambda }_b^0\to p{K}^{-}{\pi }^{+}{\pi }^{-}$, ${\Lambda }_b^0\to p{K}^{-}{K}^{+}{K}^{-}$ and ${\Xi }_b^0\to p{K}^{-}{K}^{-}{\pi }^{+}$ 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 ${\Lambda }_b^0\to p{K}^{-}{\chi }_{c0}(1P)(\to {\pi }^{+}{\pi }^{-},K^{+}{K}^{-})$ decay is also reported.

arXiv comment26 pages including author list, 10 figures

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