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A search for direct CP violation in D0 → h− h+ (where h = K or π) 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 μ 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 ΔA_CP = A_CP(K− K+) − A_CP(π− π+) = (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.

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2013). Search for Direct CP Violation in D0 → 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 D0 → h− h+ Modes Using Semileptonic B Decays

CARBONE, ANGELO;GALLI, DOMENICO;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2013

Abstract

A search for direct CP violation in D0 → h− h+ (where h = K or π) 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 μ 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 ΔA_CP = A_CP(K− K+) − A_CP(π− π+) = (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.
2013
R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2013). Search for Direct CP Violation in D0 → h− h+ Modes Using Semileptonic B Decays. PHYSICS LETTERS. SECTION B, 723(1-3), 33-43 [10.1016/j.physletb.2013.04.061].
R. Aaij; C. Abellan Beteta; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/140601
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