arxiv: 1805.03941 · v3 · ★pith:ZAQ7AZBPnew · submitted 2018-05-10 · ✦ hep-ex
Search for CP violation using triple product asymmetries in Λ⁰_(b)to pK⁻π⁺π⁻, Λ⁰_(b)to pK⁻K⁺K⁻ and Xi⁰_(b)to pK⁻K⁻π⁺ decays
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A search for $C$P and $P$ violation using triple-product asymmetries is performed with $\Lambda^{0}_{b}\to pK^{-}\pi^{+}\pi^{-}$, $\Lambda^{0}_{b}\to pK^{-}K^{+}K^{-}$ and $\Xi^{0}_{b}\to pK^{-}K^{-}\pi^{+}$ 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 $\Lambda^{0}_{b}\to pK^{-}\chi_{c0}(1P)(\to\pi^{+}\pi^{-}, K^{+}K^{-})$ decay is also reported.
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