Measurement of the $\Lambda_c^+$ lifetime

Abstract An absolute measurement of the $Λ^{+}_c$ lifetime is reported using $Λ_c^+\rightarrow pK^-π^+$ 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 $207.2~\mbox{fb}^{-1}$. The result, $τ(Λ^{+}_c) = 203.20 \pm 0.89 \,\mathrm{(stat)} \pm 0.77 \,\mathrm{(syst)}$ fs, is the most precise measurement to date and is consistent with previous determinations.
Tags
Working group Charm
Principal authors @  Jake Bennett, Angelo Di Canto, Nisar Nellikunnummel
Reference Phys.Rev.Lett. 130, 071802 (2023), DOI: 10.1103/PhysRevLett.130.071802
Document BELLE2-PUB-PH-2022-010
Links arXiv:2206.15227, Inspire, PRL
Bibtex 
@article{Belle-II:2022ggx,
    author = "Abudin{\'e}n, F. and others",
    collaboration = "Belle-II",
    title = "{Measurement of the {\ensuremath{\Lambda}}c+ Lifetime}",
    eprint = "2206.15227",
    archivePrefix = "arXiv",
    primaryClass = "hep-ex",
    reportNumber = "Belle II Preprint 2022-003, KEK Preprint 2022-13",
    doi = "10.1103/PhysRevLett.130.071802",
    journal = "Phys. Rev. Lett.",
    volume = "130",
    number = "7",
    pages = "071802",
    year = "2023"
}