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Measurement of the $$Lambda_c^+$$ lifetime

Abudin$'e$n, F.*; 谷田 聖   ; Belle II Collaboration*; 他360名*

Abudin$'e$n, F.*; Tanida, Kiyoshi; Belle II Collaboration*; 360 of others*

An absolute measurement of the $$Lambda^{+}_c$$ lifetime is reported using $$Lambda_c^+rightarrow pK^-pi^+$$ 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 $$Upsilon(4S)$$ 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.

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パーセンタイル:62.93

分野:Physics, Multidisciplinary

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