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Abstract / Description of output
A measurement of the ratios of the effective decay widths of 𝐷0→𝜋−𝜋+ and 𝐷0→𝐾−𝐾+ decays over that of 𝐷0→𝐾−𝜋+ 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 6 fb−1. These observables give access to the charm mixing parameters 𝑦𝜋𝜋𝐶𝑃−𝑦𝐾𝜋𝐶𝑃 and 𝑦𝐾𝐾𝐶𝑃−𝑦𝐾𝜋
𝐶𝑃, and are measured as 𝑦𝜋𝜋𝐶𝑃−𝑦𝐾𝜋𝐶𝑃=(6.57±0.53±0.16)×10−3, 𝑦𝐾𝐾𝐶𝑃−𝑦𝐾𝜋
𝐶𝑃=(7.08±0.30±0.14)×10−3, where the first uncertainties are statistical and the second systematic. The combination of the two measurements is 𝑦𝐶𝑃−𝑦𝐾𝜋
𝐶𝑃=(6.96±0.26±0.13)×10−3, which is four times more precise than the previous world average.
𝐶𝑃, and are measured as 𝑦𝜋𝜋𝐶𝑃−𝑦𝐾𝜋𝐶𝑃=(6.57±0.53±0.16)×10−3, 𝑦𝐾𝐾𝐶𝑃−𝑦𝐾𝜋
𝐶𝑃=(7.08±0.30±0.14)×10−3, where the first uncertainties are statistical and the second systematic. The combination of the two measurements is 𝑦𝐶𝑃−𝑦𝐾𝜋
𝐶𝑃=(6.96±0.26±0.13)×10−3, which is four times more precise than the previous world average.
| Original language | English |
|---|---|
| Article number | 092013 |
| Pages (from-to) | 1-17 |
| Number of pages | 17 |
| Journal | Physical Review D |
| Volume | 105 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 25 May 2022 |