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.

Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., et al. (2013). Search for direct CP violation in D-0 -> h(-)h(+) modes using semileptonic B decays. PHYSICS LETTERS. SECTION B, 723(1-3), 33-43 [10.1016/j.physletb.2013.04.061].

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

CALVI, MARTA;KHANJI, BASEM;KUCHARCZYK, MARCIN;Martinelli, M;PEREGO, DAVIDE LUIGI;PESSINA, GIANLUIGI EZIO;
2013

Abstract

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.
Articolo in rivista - Articolo scientifico
Heavy Flavour Physics, LHC Collider
English
2013
723
1-3
33
43
none
Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., et al. (2013). Search for direct CP violation in D-0 -> h(-)h(+) modes using semileptonic B decays. PHYSICS LETTERS. SECTION B, 723(1-3), 33-43 [10.1016/j.physletb.2013.04.061].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/65411
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