A search for time-integrated CP violation in D0 → h− h+ (h = K, π) decays is presented using 0.62 fb^−1 of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*+ → D0 π+ and D*− → anti-D0 π− decay chains. The difference in CP asymmetry between D0 → K− K+ and D0 → π− π+, ΔACP ≡ ACP(K− K+) − ACP(π− π+), is measured to be [−0.82 ± 0.21(stat) ± 0.11(syst)]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations.

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2012). Evidence for CP Violation in Time-Integrated D0 → h− h+ Decay Rates. PHYSICAL REVIEW LETTERS, 108(11), 1-8 [10.1103/PhysRevLett.108.111602].

Evidence for CP Violation in Time-Integrated D0 → h− h+ Decay Rates

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;
2012

Abstract

A search for time-integrated CP violation in D0 → h− h+ (h = K, π) decays is presented using 0.62 fb^−1 of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*+ → D0 π+ and D*− → anti-D0 π− decay chains. The difference in CP asymmetry between D0 → K− K+ and D0 → π− π+, ΔACP ≡ ACP(K− K+) − ACP(π− π+), is measured to be [−0.82 ± 0.21(stat) ± 0.11(syst)]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations.
2012
R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2012). Evidence for CP Violation in Time-Integrated D0 → h− h+ Decay Rates. PHYSICAL REVIEW LETTERS, 108(11), 1-8 [10.1103/PhysRevLett.108.111602].
R. Aaij; C. Abellan Beteta; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; G. Alkhazov; P. Alvar...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/114702
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