Measurement of the Λc+ Lifetime

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Abstract

An absolute measurement of the Λc+ lifetime is reported using Λc+→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 δ(4S) resonance, is 207.2 fb-1. The result, τ(Λc+)=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.

Original languageEnglish
Article number071802
JournalPhysical Review Letters
Volume130
Issue number7
DOIs
StatePublished - 17 Feb 2023

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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