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Measurement of the Λc+ Lifetime

F. Abudinén et al. (The Belle II Collaboration)
Phys. Rev. Lett. 130, 071802 – Published 16 February 2023

Abstract

An absolute measurement of the Λc+ lifetime is reported using Λc+pKπ+ 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 207.2fb1. The result, τ(Λc+)=203.20±0.89±0.77fs, 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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  • Received 29 June 2022
  • Accepted 25 July 2022

DOI:https://doi.org/10.1103/PhysRevLett.130.071802

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

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Vol. 130, Iss. 7 — 17 February 2023

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