Simultaneous determination of CKM angle γ and charm mixing parameters

LHCb Collaboration

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A combination of measurements sensitive to the CP violation angle γ of the Cabibbo-Kobayashi-Maskawa unitarity triangle and to the charm mixing parameters that describe oscillations between D0 and D̅ 0 mesons is performed. Results from the charm and beauty sectors, based on data collected with the LHCb detector at CERN’s Large Hadron Collider, are combined for the first time. This method provides an improvement on the precision of the charm mixing parameter y by a factor of two with respect to the current world average. The charm mixing parameters are determined to be x=(0.400−0.053+0.052)% and y = (0.630−0.030+0.033)%. The angle γ is found to be γ = (65.4−4.2+3.8)° and is the most precise determination from a single experiment.

Original languageEnglish
Article number141
Number of pages32
JournalJournal of High Energy Physics
Issue number12
Publication statusPublished - 21 Dec 2021

Bibliographical note

Publisher Copyright:
© 2021, The Author(s).


  • B physics
  • Charm physics
  • CKM angle gamma
  • CP violation
  • Hadron-Hadron scattering (experiments)

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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