Abstract
A measurement of the charm-mixing parameter using , , and decays is reported. The mesons are required to originate from semimuonic decays of and mesons. These decays are partially reconstructed in a data set of proton-proton collisions at center-of-mass energies of 7 and 8 TeV collected with the LHCb experiment and corresponding to an integrated luminosity of . The parameter is measured to be , in agreement with, and as precise as, the current world-average value.
- Received 16 October 2018
DOI:https://doi.org/10.1103/PhysRevLett.122.011802
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© 2019 CERN, for the LHCb Collaboration