We report a measurement of the D0 and D+ lifetimes using D0→K−π+ and D+→K−π+π+ decays reconstructed in e+e−→cc¯ data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy e+e− collider. The data, collected at center-of-mass energies at or near the ϒ(4S) resonance, correspond to an integrated luminosity of 72 fb−1. The results, τ(D0)=410.5±1.1(stat)±0.8(syst) fs and τ(D+)=1030.4±4.7(stat)±3.1(syst) fs, are the most precise to date and are consistent with previous determinations.
Abudinén, F., Adachi, I., Adamczyk, K., Aggarwal, L., Ahmed, H., Aihara, H., et al. (2021). Precise Measurement of the D0 and D+ Lifetimes at Belle II. PHYSICAL REVIEW LETTERS, 127(21) [10.1103/PhysRevLett.127.211801].