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. 2023 Feb 17;130(7):071802.
doi: 10.1103/PhysRevLett.130.071802.

Measurement of the Λ_{c}^{+} Lifetime

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Measurement of the Λ_{c}^{+} Lifetime

F Abudinén et al. Phys Rev Lett. .

Abstract

An absolute measurement of the Λ_{c}^{+} lifetime is reported using Λ_{c}^{+}→pK^{-}π^{+} 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 ϒ(4S) resonance, is 207.2 fb^{-1}. The result, τ(Λ_{c}^{+})=203.20±0.89±0.77 fs, where the first uncertainty is statistical and the second systematic, is the most precise measurement to date and is consistent with previous determinations.

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