动力学夸克对轻夸克质量的影响。

Dynamical quark effects on light quark masses.

作者信息

Khan AA, Aoki S, Boyd G, Burkhalter R, Ejiri S, Fukugita M, Hashimoto S, Ishizuka N, Iwasaki Y, Kanaya K, Kaneko T, Kuramashi Y, Manke T, Nagai K, Okawa M, Shanahan HP, Ukawa A, Yoshie T

机构信息

Center for Computational Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.

出版信息

Phys Rev Lett. 2000 Nov 27;85(22):4674-7. doi: 10.1103/PhysRevLett.85.4674.

DOI:10.1103/PhysRevLett.85.4674

PMID:11082624

Abstract

Light quark masses are calculated in lattice QCD with two degenerate flavors of dynamical quarks. The calculations are made with improved actions with lattice spacing a = 0.22-0.11 fm. In the continuum limit we find m(M&Smacr;)(ud)(2 GeV) = 3.44(+0.14)(-0.22) MeV using the pi and rho meson masses as physical input, and m(M&Smacr;)(s)(2 GeV) = 88(+4)(-6) MeV or 90(+5)(-11) MeV with the K or straight phi meson mass as additional input. The quoted errors represent statistical and systematic combined, the latter including those from continuum and chiral extrapolations, and from renormalization factors. Compared to quenched results, two flavors of dynamical quarks reduce quark masses by about 25%.

摘要

轻夸克质量是在具有两种简并味动态夸克的格点量子色动力学中计算的。计算使用了改进的作用量，格点间距(a = 0.22 - 0.11)飞米。在连续极限下，我们使用(\pi)介子和(\rho)介子质量作为物理输入，得到(m(M\overline{M})(ud)(2\ GeV)=3.44( + 0.14)( - 0.22))兆电子伏特，并且使用(K)介子或(\phi)介子质量作为额外输入时，(m(M\overline{M})(s)(2\ GeV)=88( + 4)( - 6))兆电子伏特或(90( + 5)( - 11))兆电子伏特。所引用的误差表示统计误差和系统误差的总和，后者包括来自连续极限和手征外推以及重整化因子的误差。与淬火结果相比，两种味的动态夸克使夸克质量降低了约(25%)。