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Search for direct CP violation in D0 -> h- h+ modes using semileptonic B decays

Abstract : A search for direct CP violation in D0 -> 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 D0 mesons produced in inclusive semileptonic b-hadron decays to the D0 mu X final state, where the charge of the accompanying muon is used to tag the flavour of the D0 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.
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http://hal.in2p3.fr/in2p3-00800500
Contributor : Sabine Starita <>
Submitted on : Wednesday, March 13, 2013 - 5:31:44 PM
Last modification on : Thursday, February 25, 2021 - 10:58:12 AM

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R. Aaij, Y. Amhis, S. Barsuk, O. Callot, J. He, et al.. Search for direct CP violation in D0 -> h- h+ modes using semileptonic B decays. Physics Letters B, Elsevier, 2013, 723, pp.33-43. ⟨10.1016/j.physletb.2013.04.061⟩. ⟨in2p3-00800500⟩

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