Measurement of D0D¯0 mixing and CP violation in two-body D0 decays

J. P. Lees et al. (BABAR Collaboration)
Phys. Rev. D 87, 012004 – Published 3 January 2013

Abstract

We present a measurement of D0D¯0 mixing and CP violation using the ratio of lifetimes simultaneously extracted from a sample of D0 mesons produced through the flavor-tagged process D*+D0π+, where D0 decays to Kπ±, KK+, or ππ+, along with the untagged decays D0Kπ± and D0KK+. The lifetimes of the CP-even, Cabibbo-suppressed modes KK+ and ππ+ are compared to that of the CP-mixed mode Kπ± in order to measure yCP and ΔY. We obtain yCP=[0.72±0.18(stat)±0.12(syst)]% and ΔY=[0.09±0.26(stat)±0.06(syst)]%, where ΔY constrains possible CP violation. The yCP result excludes the null mixing hypothesis at 3.3σ significance. This analysis is based on an integrated luminosity of 468fb1 collected with the BABAR detector at the PEP-II asymmetric-energy e+e collider.

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  • Received 20 September 2012

DOI:https://doi.org/10.1103/PhysRevD.87.012004

© 2013 American Physical Society

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Vol. 87, Iss. 1 — 1 January 2013

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