Asymmetries in the time-dependent rates of D0âK+K-and D0âÏ+Ï-decays are measured in a pp collision data sample collected with the LHCb detector during LHC Run 1, corresponding to an integrated luminosity of 3 fb-1. The asymmetries in effective decay widths between D0 and D-0 decays, sensitive to indirect CP violation, are measured to be AÎ(K+K-)=(-0.30±0.32±0.10)Ã10-3 and AÎ(Ï+Ï-)=(0.46±0.58±0.12)Ã10-3, where the first uncertainty is statistical and the second systematic. These measurements show no evidence for CP violation and improve on the precision of the previous best measurements by nearly a factor of two.
Measurement of the CP Violation Parameter A Γ in D0 →k+K-and D0 →π+π-Decays
De Serio, M.;Pappagallo, M.;
2017-01-01
Abstract
Asymmetries in the time-dependent rates of D0âK+K-and D0âÏ+Ï-decays are measured in a pp collision data sample collected with the LHCb detector during LHC Run 1, corresponding to an integrated luminosity of 3 fb-1. The asymmetries in effective decay widths between D0 and D-0 decays, sensitive to indirect CP violation, are measured to be AÎ(K+K-)=(-0.30±0.32±0.10)Ã10-3 and AÎ(Ï+Ï-)=(0.46±0.58±0.12)Ã10-3, where the first uncertainty is statistical and the second systematic. These measurements show no evidence for CP violation and improve on the precision of the previous best measurements by nearly a factor of two.File in questo prodotto:
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