Measurement of the lifetime

Abudinn, F.*; Tanida, Kiyoshi ; Belle II Collaboration*; 360 of others*

An absolute measurement of the $Lambda^{+}_c$ lifetime is reported using decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the resonance, is $207.2~mbox{fb}^{-1}$ . The result, $tau(Lambda^{+}_c) = 203.20 pm 0.89 ,mathrm{(stat)} pm 0.77 ,mathrm{(syst)}$ fs, is the most precise measurement to date and is consistent with previous determinations.

Language	:	English
Journal	:	Physical Review Letters
Volume	:	130
Number	:	7
Pages	:	p.071802_1 - 071802_7
Publication Year/Month	:	2023/02
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Paper URL	:	https://doi.org/10.1103/PhysRevLett.130.071802
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Keywords	:	no keyword
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Registration No. : AA20250709
JAEA Abstracts No. : 54000818
Paper Submission No. : 31298

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