arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.11261hep-lat
收藏

Brillouin费米子单圈阶$c_\mathrm{SW}$的计算

Calculation of $c_\mathrm{SW}$ at one-loop order for Brillouin fermions

Maximilian Ammer, Stephan Durr

AI总结:

本文计算了Brillouin费米子作用量在格点微扰论下的单圈阶Sheikholeslami-Wohlert系数$c_\mathrm{SW}^{(1)}$,发现其数值约为Wilson作用量的一半。

摘要:

Brillouin作用量是一种类似Wilson的格点费米子作用量,具有81点模板,在许多方面改善了Wilson作用量。三叶草改进项的Sheikholeslami-Wohlert系数$c_\mathrm{SW}$具有微扰展开式$c_\mathrm{SW}=c_\mathrm{SW}^{(0)}+g_0^2c_\mathrm{SW}^{(1)}+\mathcal{O}(g_0^4)$。在树图阶,Wilson和Brillouin费米子均满足$c_\mathrm{SW}^{(0)}=r$。我们给出了格点微扰论中Brillouin作用量的费曼规则,并利用它们计算了采用plaquette或Lüscher-Weisz胶子的单圈系数$c_\mathrm{SW}^{(1)}$。数值上其值约为Wilson作用量的一半。

英文摘要:

The Brillouin action is a Wilson-like lattice fermion action with a 81-point stencil, which was found to ameliorate the Wilson action in many respects. The Sheikholeslami-Wohlert coefficient $c_\mathrm{SW}$ of the clover improvement term has a perturbative expansion $c_\mathrm{SW}=c_\mathrm{SW}^{(0)}+g_0^2c_\mathrm{SW}^{(1)}+\mathcal{O}(g_0^4)$. At tree-level $c_\mathrm{SW}^{(0)}=r$ holds for Wilson and Brillouin fermions alike. We present the Feynman rules for the Brillouin action in lattice perturbation theory, and employ them to calculate the one-loop coefficient $c_\mathrm{SW}^{(1)}$ with plaquette or Lüscher-Weisz gluons. Numerically its value is found to be about half that of the Wilson action.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑