Search for CP violation in Λ b 0 → p K − and Λ b 0 → p π − decays
Author(s)
The LHCb Collaboration; Boettcher, Thomas Julian; Craik, Daniel C; Weisser, Constantin; Williams, Michael![Thumbnail](/bitstream/handle/1721.1/133715.2/1-s2.0-S0370269318308104-main.pdf.jpg?sequence=2&isAllowed=y)
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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.
Date issued
2018Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publisher
Elsevier BV