Charm physics with overlap fermions on 2+1-flavor domain wall fermion configurations

Dong Hao Li, Ying Chen, Ming Gong, Keh Fei Liu, Zhaofeng Liu, Ting Xiao Wang

Research output: Contribution to journalArticlepeer-review

Abstract

Decay constants of pseudoscalar mesons D, , and vector mesons , , are determined from the lattice QCD at a lattice spacing fm. For vector mesons, the decay constants defined by tensor currents are given in the scheme at GeV. The calculation is performed on domain wall fermion configurations generated by the RBC-UKQCD collaborations and the overlap fermion action is used for the valence quarks. Comparing the current results with our previous results at a coarser lattice spacing fm provides a better understanding of the discretization error. We obtain with a better precision than our previous result. Combining our MeV with the total width of determined in a recent study gives a branching fraction for leptonic decay.

Original languageEnglish
Article number123104
JournalChinese Physics C
Volume48
Issue number12
DOIs
StatePublished - Dec 1 2024

Bibliographical note

Publisher Copyright:
© 2024 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

Keywords

  • charmed meson decay constants
  • charmonium decay constants
  • lattice QCD
  • leptonic decays
  • overlap fermions
  • vector meson decay constants

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation
  • Astronomy and Astrophysics

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