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 mu X 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. (c) 2013 CERN. Published by Elsevier B.V. All rights reserved.
Titolo: | Search for direct CP violation in D-0 -> h(-)h(+) modes using semileptonic B decays | |
Autori: | ||
Data di pubblicazione: | 2013 | |
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Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.physletb.2013.04.061 | |
Handle: | http://hdl.handle.net/11384/39021 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |