重粒子-轻粒子衰变常数的格点计算

MILC Collaboration; C. Bernard; T. DeGrand; C. DeTar; Steven Gottlieb; Urs M. Heller; J. E. Hetrick; N. Ishizuka; C. McNeile; R. Sugar; D. Toussaint; M. Wingate

doi:10.1103/PhysRevLett.81.4812

重粒子-轻粒子衰变常数的格点计算

高能物理 - 唯象学 2008-11-26 v2 高能物理 - 格点

作者: MILC Collaboration , C. Bernard , T. DeGrand , C. DeTar , Steven Gottlieb , Urs M. Heller , J. E. Hetrick , N. Ishizuka , C. McNeile , R. Sugar , D. Toussaint , M. Wingate

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摘要

我们报告了MILC合作实验对 $f_B$ 、 $f_{B_s}$ 、 $f_D$ 、 $f_{D_s}$ 及其比值的计算。我们的中心值采用退化近似得到，但通过 $N_F=2$ 的动力学斜仿射格点来估计退化误差。我们采用Wilson型轻价值夸克和Wilson型、静态重价值夸克。例如，我们发现 $f_B=157 \pm 11 {}^{+25}_{-9} {}^{+23}_{-0} \MeV$ 、 $f_{B_s}/f_B = 1.11 \pm 0.02 {}^{+0.04}_{-0.03} \pm 0.03$ 、 $f_{D_s} = 210 \pm 9 {}^{+25}_{-9} {}^{+17}_{-1} \MeV$ 以及 $f_{B}/f_{D_s} = 0.75 \pm 0.03 {}^{+0.04}_{-0.02} {}^{+0.08}_{-0.00}$ ，其中误差依次为统计误差、在退化近似内的系统误差以及退化系统误差。

关键词

重粒子-轻粒子衰变常数格点量子色动力学 MILC合作退化近似斜仿射夸克

引用

@article{arxiv.hep-ph/9806412,
  title  = {Lattice Determination of Heavy-Light Decay Constants},
  author = {MILC Collaboration and C. Bernard and T. DeGrand and C. DeTar and Steven Gottlieb and Urs M. Heller and J. E. Hetrick and N. Ishizuka and C. McNeile and R. Sugar and D. Toussaint and M. Wingate},
  journal= {arXiv preprint arXiv:hep-ph/9806412},
  year   = {2008}
}

备注

4 pages, 2 included figures. We adjust the perturbative correction calculated by Kuramashi to take into account the fact that we match to the continuum at the kinetic mass of the heavy meson, not the pole mass. This produces a 2 to 4 MeV change in final results for decay constants, and has negligible effect on decay constant ratios. We also include further explanation of various features of the analysis

重粒子-轻粒子衰变常数的格点计算

摘要

关键词

引用

备注

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