Precise measurement of the $D^0$ and $D^+$ lifetimes at Belle II

Abstract We report a measurement of the $D^0$ and $D^+$ lifetimes using $D^0\to K^-\pi^+$ and $D^+\to K^-\pi^+\pi^+$ decays reconstructed in $e^+e^-\to c\bar{c}$ data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy $e^+e^-$ collider. The data, collected at center-of-mass energies at or near the $\Upsilon(4S)$ resonance, correspond to an integrated luminosity of $72\,{\rm fb}^{-1}$. The results, $\tau(D^0) = 410.5\pm1.1\,{\rm(stat)}\pm0.8\,{\rm(syst.)}\,{\rm fs}$ and $\tau(D^+) = 1030.4\pm4.7\,{\rm(stat)}\pm3.1\,{\rm(syst.)}\,{\rm fs}$, are the most precise to date and are consistent with previous determinations.
Tags
Working group Charm
Principal authors @  Tadeas Bilka, Giulia Casarosa, Angelo Di Canto, Mirco Dorigo, Nisar Nellikunnummel, Radek Zlebcik
Reference Phys.Rev.Lett. 127, 211801 (2021), DOI: 10.1103/PhysRevLett.127.211801
Document BELLE2-PUB-PH-2021-003
Links arXiv:2108.03216, Inspire, PRL
Bibtex 
@article{Belle-II:2021cxx,
    author = "Abudin{\'e}n, F. and others",
    collaboration = "Belle-II",
    title = "{Precise measurement of the $D^0$ and $D^+$ lifetimes at Belle II}",
    eprint = "2108.03216",
    archivePrefix = "arXiv",
    primaryClass = "hep-ex",
    reportNumber = "Belle II Preprint 2021-002, KEK Preprint 2021-12",
    doi = "10.1103/PhysRevLett.127.211801",
    journal = "Phys. Rev. Lett.",
    volume = "127",
    number = "21",
    pages = "211801",
    year = "2021"
}