Charm physics with overlap fermions on 2+1-flavor domain wall fermion configurations
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arXiv
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| Format: | Preprint |
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2024
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| author | Li, Donghao Chen, Ying Gong, Ming Liu, Keh-Fei Liu, Zhaofeng Wang, Tingxiao |
| author_facet | Li, Donghao Chen, Ying Gong, Ming Liu, Keh-Fei Liu, Zhaofeng Wang, Tingxiao |
| contents | Decay constants of pseudoscalar mesons $D$, $D_s$, $η_c$ and vector mesons $D^*$, $D_s^*$, $J/ψ$ are determined from $N_f=2+1$ lattice QCD at a lattice spacing $a\sim0.08$ fm. For vector mesons, the decay constants defined by tensor currents are given in the $\overline{\rm MS}$ scheme at $2$ 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 ones at a coarser lattice spacing $a\sim0.11$ fm gives us a better understanding of the discretization error. We obtain $f_{D_s^*}^T(\overline{\rm MS},\text{2 GeV})/f_{D_s^*}=0.907(20)$ with a better precision than our previous result. Combining our $f_{D_s^*}=277(11)$ MeV with the total width of $D_s^*$ determined in a recent work gives a branching fraction $4.26(52)\times10^{-5}$ for $D_s^*$ leptonic decay. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_03697 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Charm physics with overlap fermions on 2+1-flavor domain wall fermion configurations Li, Donghao Chen, Ying Gong, Ming Liu, Keh-Fei Liu, Zhaofeng Wang, Tingxiao High Energy Physics - Lattice High Energy Physics - Experiment High Energy Physics - Phenomenology Decay constants of pseudoscalar mesons $D$, $D_s$, $η_c$ and vector mesons $D^*$, $D_s^*$, $J/ψ$ are determined from $N_f=2+1$ lattice QCD at a lattice spacing $a\sim0.08$ fm. For vector mesons, the decay constants defined by tensor currents are given in the $\overline{\rm MS}$ scheme at $2$ 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 ones at a coarser lattice spacing $a\sim0.11$ fm gives us a better understanding of the discretization error. We obtain $f_{D_s^*}^T(\overline{\rm MS},\text{2 GeV})/f_{D_s^*}=0.907(20)$ with a better precision than our previous result. Combining our $f_{D_s^*}=277(11)$ MeV with the total width of $D_s^*$ determined in a recent work gives a branching fraction $4.26(52)\times10^{-5}$ for $D_s^*$ leptonic decay. |
| title | Charm physics with overlap fermions on 2+1-flavor domain wall fermion configurations |
| topic | High Energy Physics - Lattice High Energy Physics - Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.03697 |