Measurement of mixing and CP violation parameters in two-body charm decays

Measurement of mixing and CP violation parameters in two-body charm decays

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...

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Bibliographic Details
Main Authors: Aaij, R, Abellan Beteta, C, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Jr, A, Amato, S, Amhis, Y, Anderson, J, Appleby, R, Gutierrez, O, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Bachmann, S
Format: Journal article
Language:English
Published: 2012
Description
Summary: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 yCP = (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 D̄ 0 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. Copyright CERN.

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