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

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 generat...

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Published inChinese physics C Vol. 48; no. 12; p. 123104
Main Authors Li, Dong-Hao, Chen, Ying, Gong, Ming, liu, keh-fei, Liu, Zhaofeng, Wang, Ting-Xiao
Format Journal Article
LanguageEnglish
Published China IOP Publishing 01.12.2024
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ISSN1674-1137
2058-6132
DOI10.1088/1674-1137/ad736f

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Summary: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.
Bibliography:USDOE
ISSN:1674-1137
2058-6132
DOI:10.1088/1674-1137/ad736f