A study of mixing and indirect CP violation in D 0 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 D 0 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 ) × 10 −3 . The parameter A Γ is the asymmetry of effective lifetimes measured in decays of D 0 and mesons to K + K − . The result is A Γ = (−5 . 9 ± 5 . 9 stat ± 2 . 1 syst ) × 10 −3 . A data-driven technique is used to correct for lifetime-biasing effects.
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Titolo: | Measurement of mixing and CP violation parameters in two-body charm decays |
Autori: | |
Data di pubblicazione: | 2012 |
Rivista: | |
Abstract: | A study of mixing and indirect CP violation in D 0 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 D 0 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 ) × 10 −3 . The parameter A Γ is the asymmetry of effective lifetimes measured in decays of D 0 and mesons to K + K − . The result is A Γ = (−5 . 9 ± 5 . 9 stat ± 2 . 1 syst ) × 10 −3 . A data-driven technique is used to correct for lifetime-biasing effects. |
Handle: | http://hdl.handle.net/11567/379527 |
Appare nelle tipologie: | 01.01 - Articolo su rivista |