Abstract
A measurement of the ratios of the effective decay widths of and decays over that of decays is performed with the LHCb experiment using proton–proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of . These observables give access to the charm mixing parameters and , and are measured as , , where the first uncertainties are statistical and the second systematic. The combination of the two measurements is , which is four times more precise than the previous world average.
- Received 23 February 2022
- Accepted 6 May 2022
DOI:https://doi.org/10.1103/PhysRevD.105.092013
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