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arXiv 1606.01650hep-lathep-phnucl-th
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用$N_f=2+1+1$扭曲质量费米子计算超子和粲重子的轴荷

Axial charges of hyperons and charmed baryons using $N_f=2+1+1$ twisted mass fermions

C. Alexandrou, K. Hadjiyiannakou, Ch. Kallidonis

摘要:

用总共五个动力学扭曲质量费米子规范组态系综计算了低位置重子的轴向耦合。模拟使用岩崎规范作用和两个简并的轻夸克的味道,和一个奇怪的和一个魅力夸克固定到大约他们的物理值在两个值的耦合常数。使用核子质量确定的晶格间距为$a=0.082$ fm和$a=0.065$ fm,并且模拟覆盖了约210 MeV至430 MeV范围内的π介子质量。我们研究了在210 MeV到430 MeV范围内轴向耦合对π介子质量的依赖性,以及当我们将轻夸克质量减小到其物理值时的$SU(3)$破缺效应。

英文摘要:

The axial couplings of the low lying baryons are evaluated using a total of five ensembles of dynamical twisted mass fermion gauge configurations. The simulations are performed using the Iwasaki gauge action and two degenerate flavors of light quarks, and a strange and a charm quark fixed to approximately their physical values at two values of the coupling constant. The lattice spacings, determined using the nucleon mass, are $a=0.082$ fm and $a=0.065$ fm and the simulations cover a pion mass in the range of about 210 MeV to 430 MeV. We study the dependence of the axial couplings on the pion mass in the range of about 210 MeV to 430 MeV as well as the $SU(3)$ breaking effects as we decrease the light quark mass towards its physical value.

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。

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