• Open Access

Measurements of charm mixing and CP violation using D0K±π decays

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. D 95, 052004 – Published 23 March 2017; Erratum Phys. Rev. D 96, 099907 (2017)

Abstract

Measurements of charm mixing and CP violation parameters from the decay-time-dependent ratio of D0K+π to D0Kπ+ decay rates and the charge-conjugate ratio are reported. The analysis uses B¯D*+μX, and charge-conjugate decays, where D*+D0π+, and D0Kπ±. The pp collision data are recorded by the LHCb experiment at center-of-mass energies s=7 and 8 TeV, corresponding to an integrated luminosity of 3fb1. The data are analyzed under three hypotheses: (i) mixing assuming CP symmetry, (ii) mixing assuming no direct CP violation in the Cabibbo-favored or doubly Cabibbo-suppressed decay amplitudes, and (iii) mixing allowing either direct CP violation and/or CP violation in the superpositions of flavor eigenstates defining the mass eigenstates. The data are also combined with those from a previous LHCb study of D0Kπ decays from a disjoint set of D*+ candidates produced directly in pp collisions. In all cases, the data are consistent with the hypothesis of CP symmetry.

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  • Received 25 November 2016

DOI:https://doi.org/10.1103/PhysRevD.95.052004

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2017 CERN, for the LHCb Collaboration

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Vol. 95, Iss. 5 — 1 March 2017

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