Simulating twisted mass fermions at physical light, strange, and charm quark masses
Simulating twisted mass fermions at physical light, strange, and charm quark masses
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DOI：
10.1103/physrevd.98.054518
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发表时间：
2018-09-27
影响因子：
5
通讯作者：
Urbach, Carsten
中科院分区：
文献类型：
--
作者：
Alexandrou, Constantia;Bacchio, Simone;Urbach, Carsten
我们提出的QCD模拟的第一个规范系综的两个简并轻夸克，一个奇怪的和魅力夸克与所有的夸克质量调整到他们的物理值内的扭曲质量费米子制定。赝标量质量和衰变常数的结果证实了产生的系综确实是在理论的物理参数。这一结论得到了重子区补充分析的证实。我们研究了截止和同位旋断裂效应，并证明了它们是通过存在一个三叶草长期的行动抑制。
We present the QCD simulation of the first gauge ensemble of two degenerate light quarks, a strange and a charm quark with all quark masses tuned to their physical values within the twisted mass fermion formulation. Results for the pseudoscalar masses and decay constants confirm that the produced ensemble is indeed at the physical parameters of the theory. This conclusion is corroborated by a complementary analysis in the baryon sector. We examine cutoff and isospin breaking effects and demonstrate that they are suppressed through the presence of a clover term in the action.