Search for direct CP violation in D-0 -> h(-)h(+) modes using semileptonic B decays
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Search for direct CP violation in D-0 -> h(-)h(+) modes using semileptonic B decays

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Search for direct CP violation in D-0 -> h(-)h(+) modes using semileptonic B decays

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LHCb Collaboration; Oyanguren Campos, Arantza Perfil; Ruiz Valls, Pablo
Aquest document és un/a article, creat/da en: 2013

Este documento está disponible también en : http://dx.doi.org/10.1016/j.physletb.2013.04.061
A search for direct CP violation in D-0 -> h(-)h(+) (where h = K or pi) is presented using data corresponding to an integrated luminosity of 1.0 fb(-1) collected in 2011 by LHCb in pp collisions at a centre-of-mass energy of 7 TeV. The analysis uses D-0 mesons produced in inclusive semileptonic b-hadron decays to the D-0 μX final state, where the charge of the accompanying muon is used to tag the flavour of the D-0 meson. The difference in the CP-violating asymmetries between the two decay channels is measured to be Delta A(CP) = A(CP)(K-K+) ¿ A(CP)(pi(-)pi(+)) = (0.49 +/- 0.30 (stat) +/- 0.14 (syst))%. This result does not confirm the evidence for direct CP violation in the charm sector reported in other analyses.

    LHCb Collaboration Oyanguren Campos, Arantza Ruiz Valls, Pablo 2013 Search for direct CP violation in D-0 -> h(-)h(+) modes using semileptonic B decays Physics Letters B 723 1-3 33 43
http://dx.doi.org/10.1016/j.physletb.2013.04.061
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