Precise measurement of the and lifetimes at Belle II

Abudinn, F.*; Tanida, Kiyoshi ; Belle II Collaboration*; 385 of others*

We report a measurement of the and lifetimes using and decays reconstructed in $e^+e^-to cbar{c}$ data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy collider. The data, collected at center-of-mass energies at or near the resonance, correspond to an integrated luminosity of $72,{rm fb}^{-1}$ . The results, $tau(D^0) = 410.5pm1.1,{rm(stat)}pm0.8,{rm(syst.)},{rm fs}$ and $tau(D^+) = 1030.4pm4.7,{rm(stat)}pm3.1,{rm(syst.)},{rm fs}$ , are the most precise to date and are consistent with previous determinations.

Language	:	English
Journal	:	Physical Review Letters
Volume	:	127
Number	:	21
Pages	:	p.211801_1 - 211801_9
Publication Year/Month	:	2021/11
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Paper URL	:	https://doi.org/10.1103/PhysRevLett.127.211801
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Keywords	:	no keyword
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Cooperating Institute	:	高エネルギー加速器研究機構

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Registration No. : AA20220416
JAEA Abstracts No. : 50001008
Paper Submission No. : 25755

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