A study of mixing and indirect CP violation in D0 mesons through the determination of the parameters y_CP and A_Γ is presented. The parameter y_CP is the deviation from unity of the ratio of effective lifetimes measured in D0 decays to the CP eigenstate K+ K− with respect to decays to the Cabibbo favoured mode K− π+. The result measured using data collected by LHCb in 2010, corresponding to an integrated luminosity of 29 pb^−1, is y_CP = (5.5 ± 6.3(stat) ± 4.1(syst)) x 10^−3. The parameter A_Γ is the asymmetry of effective lifetimes measured in decays of D0 and anti-D0 mesons to K+ K−. The result is A_Γ = (−5.9 ± 5.9(stat) ± 2.1(syst)) x 10^−3. A data-driven technique is used to correct for lifetime-biasing effects.

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2012). Measurement of Mixing and CP Violation Parameters in Two-Body Charm Decays. JOURNAL OF HIGH ENERGY PHYSICS, 1204(4), 129-0-129-20 [10.1007/JHEP04(2012)129].

Measurement of Mixing and CP Violation Parameters in Two-Body Charm Decays

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

Abstract

A study of mixing and indirect CP violation in D0 mesons through the determination of the parameters y_CP and A_Γ is presented. The parameter y_CP is the deviation from unity of the ratio of effective lifetimes measured in D0 decays to the CP eigenstate K+ K− with respect to decays to the Cabibbo favoured mode K− π+. The result measured using data collected by LHCb in 2010, corresponding to an integrated luminosity of 29 pb^−1, is y_CP = (5.5 ± 6.3(stat) ± 4.1(syst)) x 10^−3. The parameter A_Γ is the asymmetry of effective lifetimes measured in decays of D0 and anti-D0 mesons to K+ K−. The result is A_Γ = (−5.9 ± 5.9(stat) ± 2.1(syst)) x 10^−3. A data-driven technique is used to correct for lifetime-biasing effects.
2012
R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2012). Measurement of Mixing and CP Violation Parameters in Two-Body Charm Decays. JOURNAL OF HIGH ENERGY PHYSICS, 1204(4), 129-0-129-20 [10.1007/JHEP04(2012)129].
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/11585/116081
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