• Open Access

Measurement of CP Violation in B0D+D Decays

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. Lett. 117, 261801 – Published 23 December 2016
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Abstract

The CP violation observables S and C in the decay channel B0D+D are determined from a sample of proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to an integrated luminosity of 3fb1. The observable S describes CP violation in the interference between mixing and the decay amplitude, and C parametrizes direct CP violation in the decay. The following values are obtained from a flavor-tagged, decay-time-dependent analysis: S=0.540.16+0.17(stat)±0.05(syst), C=0.260.17+0.18(stat)±0.02(syst). These values provide evidence for CP violation at a significance level of 4.0 standard deviations. The phase shift due to higher-order standard model corrections is constrained to a small value of Δϕ=0.160.21+0.19rad.

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  • Received 24 August 2016

DOI:https://doi.org/10.1103/PhysRevLett.117.261801

Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2016 CERN, for the LHCb Collaboration

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Vol. 117, Iss. 26 — 23 December 2016

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