Search for CP violation using triple product asymmetries in Λ b0  → pKπ+π, Λ b0  → pK−K+K− and Ξ b0  → pKKπ+ decays

Peter Clarke, Greig Cowan, Stephan Eisenhardt, Silvia Gambetta, Franz Muheim, Matthew Needham, Stephen Playfer, LHCb Collaboration, Marco Pappagallo

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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.
Original languageEnglish
Article number039
Journal Journal of High Energy Physics
Early online date9 Aug 2018
Publication statusE-pub ahead of print - 9 Aug 2018


Dive into the research topics of 'Search for CP violation using triple product asymmetries in Λ <sub>b</sub><sup>0</sup>  → pK<sup>−</sup>π<sup>+</sup>π<sup>−</sup>, Λ <sub>b</sub><sup>0</sup>  → pK−K+K− and Ξ <sub>b</sub><sup>0</sup>  → pK<sup>−</sup>K<sup>−</sup>π<sup>+ </sup>decays'. Together they form a unique fingerprint.

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