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A search for $C\!P$ violation in $\Lambda^0_b \to p K^-$ and $\Lambda^0_b \top \pi^-$ decays is presented using a sample of $pp$ collisions collected withthe LHCb detector and corresponding to an integrated luminosity of 3.0fb$^{-1}$. The $C\!P$-violating asymmetries are measured to be$A_{\mathrm{CP}}^{pK^-} = -0.020 \pm 0.013\pm 0.019$ and$A_{\mathrm{CP}}^{p\pi^-} = -0.035 \pm 0.017 \pm 0.020 $, and their difference$A_{\mathrm{CP}}^{pK^-}-A_{\mathrm{CP}}^{p\pi^-} = 0.014 \pm 0.022 \pm 0.010$,where the first uncertainties are statistical and the second systematic. Theseare the most precise measurements of such asymmetries to date.

Search for $C\!P$ violation in $\Lambda^0_b \to p K^-$ and $\Lambda^0_b \to p \pi^-$ decays