Abstract
The semileptonic asymmetry in - mixing, , is measured in proton-proton collision data, corresponding to an integrated luminosity of , recorded by the LHCb experiment. Semileptonic decays are reconstructed in the inclusive final states and , where the meson decays into the final state and the meson into the final state. The asymmetry between the numbers of and decays is measured as a function of the decay time of the mesons. The asymmetry is measured to be , where the first uncertainty is statistical and the second systematic. This is the most precise measurement of to date and is consistent with the prediction from the standard model.
- Received 1 October 2014
DOI:https://doi.org/10.1103/PhysRevLett.114.041601
This article is available 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.
© 2015 CERN, for the LHCb Collaboration