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PHYSICAL REVIEW LETTERS 127, 211801 (2021)

ISSN: 0031-9007, SCIE

Precise Measurement of the D0 and D+ Lifetimes at Belle II

The Belle II collaboration (F. Abudinén, ..., N. Anh Ky, ...)

We report a measurement of the D0 and Dþ lifetimes using D0 → K−πþ and Dþ → K−πþπþ decays reconstructed in eþe− → c¯c data recorded by the Belle II experiment at the SuperKEKB asymmetricenergy eþe− collider. The data, collected at center-of-mass energies at or near the ϒð4SÞ resonance, correspond to an integrated luminosity of 72 fb−1. The results, τðD0Þ ¼ 410.5  1.1ðstatÞ  0.8ðsystÞ fs and τðDþÞ ¼ 1030.4  4.7ðstatÞ  3.1ðsystÞ fs, are the most precise to date and are consistent with previous determinations.

DOI: 10.1103/PhysRevLett.127.211801

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