文章基本信息

标题：Chiral Limit and Light Quark Masses in 2+1 Flavor Domain Wall QCD
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作者：M. Lin ; E.E. Scholz
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2007
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present results for meson masses and decay constants measured on 243 ×64 lattices using the domain wall fermion formulation with an extension of the fifth dimension of Ls = 16 for Nf = 2+1 dynamical quark flavors. The lightest dynamical meson mass in our set-up is around 331MeV, while partially quenched mesons reach masses as low as 250MeV. The applicability of SU(3)×SU(3) and SU(2)×SU(2) (partially quenched) chiral perturbation theory will be compared and we quote values for the low-energy constants from both approaches. We will extract the average light quark and strange quark masses and use a non-perturbative renormalization technique (RI/MOM) to quote their physical values. The pion and kaon decay constants are determined at those values from our chiral fits and their ratio is used to obtain the CKM-matrix element |Vus|. The results presented here include statistical errors only.