Charmed and ϕ meson decay constants from 2+1-flavor lattice QCD Supported by the National Key Research and Development Program of China (2017YFB0203200). This work was partially supported by the National Natural Science Foundation of China (NSFC) (11935017). This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy (DE-AC05-00OR22725). This work used Stampede time under the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation (ACI-1053575),Chinese Physics C

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Charmed and ϕ meson decay constants from 2+1-flavor lattice QCD Supported by the National Key Research and Development Program of China (2017YFB0203200). This work was partially supported by the National Natural Science Foundation of China (NSFC) (11935017). This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy (DE-AC05-00OR22725). This work used Stampede time under the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation (ACI-1053575)
Chinese Physics C ( IF 3.6 ) Pub Date : 2021-01-25 , DOI: 10.1088/1674-1137/abcd8f
Ying Chen _{1,

2} , Wei-Feng Chiu ₁ , Ming Gong _{1,

2} , Zhaofeng Liu _{1,

2} , Yunheng Ma _{1,

2}

Affiliation

On a lattice with 2+1-flavor dynamical domain-wall fermions at the physical pion mass, we calculate the decay constants of $D_{s}^{(*)}$ , $D^{(*)}$ , and $\phi$ . The lattice size is $48^3\times96$ , which corresponds to a spatial extension of $\sim5.5$ fm, with a lattice spacing of $a\approx 0.114$ fm. For the valence light, strange, and charm quarks, we use overlap fermions at several mass points close to their physical values. Our results at the physical point are $ f_D = 213(5) $ MeV, $f_{D_s} = 249(7)$ MeV, $f_{D^*} = 234(6)$ MeV, $f_{D_s^*} = 274(7)$ MeV, and $f_\phi = 241(9)$ MeV. The couplings of $ D^* $ and $ D_s^* $ to the tensor current ( $ f_V^T $ ) can be derived from ratios $f_{D^*}^T/f_{D^*} = 0.91(4)$ and $f_{D_s^*}^T/f_{D_s^*} = 0.92(4)$ , respectively, which are the first lattice quantum chromodynamics (QCD) results. We also obtain ratios $f_{D^*}/f_D = 1.10(3)$ and $f_{D_s^*}/f_{D_s} = 1.10(4)$ , which reflect the size of heavy quark symmetry breaking in charmed mesons. Ratios $f_{D_s}/f_{D} = 1.16(3)$ and $f_{D_s^*}/f_{D^*} = 1.17(3)$ can be taken as a measure of SU(3) flavor symmetry breaking.

中文翻译：

国家重点研发计划(2017YFB0203200) 2+1-味晶格QCD的Charmed和φ介子衰减常数。这项工作得到了国家自然科学基金 (NSFC) (11935017) 的部分支持。这项研究使用了橡树岭国家实验室橡树岭领导计算设施的资源，该实验室得到了美国能源部科学办公室 (DE-AC05-00OR22725) 的支持。这项工作使用了国家科学基金会 (ACI-1053575) 支持的极端科学与工程发现环境 (XSEDE) 下的 Stampede 时间

在物理介子质量处具有 2+1 型动态畴壁费米子的晶格上，我们计算、和的 $D_{s}^{(*)}$ 衰减 $D^{(*)}$ 常数 $\phi$ 。晶格尺寸为 $48^3\times96$ ，对应于 fm 的空间扩展， $\sim5.5$ 晶格间距为 $a\约 0.114$ fm。对于价光夸克、奇夸克和粲夸克，我们在接近其物理值的几个质量点使用重叠费米子。我们在物理点的结果是 $ f_D = 213(5) $ MeV、 $f_{D_s} = 249(7)$ MeV、 $f_{D^*} = 234(6)$ MeV、 $f_{D_s^*} = 274(7)$ MeV 和 $f_\phi = 241(9)$ MeV。张 $ D^* $ 量 $ D_s^* $ 电流( $ f_V^T $ _ $f_{D^*}^T/f_{D^*} = 0.91(4)$ _ $f_{D_s^*}^T/f_{D_s^*} = 0.92(4)$ 我们还获得比率 $f_{D^*}/f_D = 1.10(3)$ 和 $f_{D_s^*}/f_{D_s} = 1.10(4)$ ，它反映了粲介子中重夸克对称性破缺的大小。比率 $f_{D_s}/f_{D} = 1.16(3)$ 和 $f_{D_s^*}/f_{D^*} = 1.17(3)$ 可以作为SU (3) 风味对称性破坏的量度。

更新日期：2021-01-25

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