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Search for C\!P violation in Λ⁰_b to p K^- and Λ⁰_b to p π^- decays
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arxiv 1807.06544 v2 pith:MAVFG5X7 submitted 2018-07-17 hep-ex
Search for C\!P violation in Λ⁰_b to p K^- and Λ⁰_b to p π^- decays
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A search for $C\!P$ violation in $\Lambda^0_b \to p K^-$ and $\Lambda^0_b \to p \pi^-$ decays is presented using a sample of $pp$ collisions collected with the LHCb detector and corresponding to an integrated luminosity of 3.0 fb$^{-1}$. 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. These are the most precise measurements of such asymmetries to date.
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Study of $\Lambda^0_b \to \Lambda D$ decays with the rescattering mechanism
hep-ph 2026-06 unverdicted novelty 4.0
Rescattering enhances the anti-D0 Lambda branching fraction by two orders of magnitude and produces large direct CP asymmetries (0.28 and -0.14) in Lambda_b to Lambda D channels.
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