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Journal Article

Search for CP violation in Λ0b → pK and Λ0b → pπ decays

MPS-Authors
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Popov,  D.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Schmelling,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Zavertiaev,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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1807.06544.pdf
(Preprint), 953KB

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Citation

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., et al. (2018). Search for CP violation in Λ0b → pK and Λ0b → pπ decays. Physics Letters B, 787, 124-133. doi:10.1016/j.physletb.2018.10.039.


Cite as: http://hdl.handle.net/21.11116/0000-0005-740A-E
Abstract
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.