Diquark mass differences from unquenched lattice QCD  

作　　者：毕玉江 蔡浩 陈莹 宫明 刘朝峰 乔豪学 杨一玻 

机构地区：[1]School of Physics and Technology, Wuhan Universitv, Wuhan 430072, China [2]Institute of High Energy Physics and Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China [3]Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506, USA

出　　处：《Chinese Physics C》2016年第7期43-54,共12页中国物理C（英文版）

基　　金：Supported by National Science Foundation of China(11575197,10835002,11405178,11335001);joint funds of NSFC(U1232109);MG and ZL are partially supported by the Youth Innovation Promotion Association of CAS(2015013,2011013);YC and ZL acknowledge support of NSFC and DFG(CRC110)

摘　　要：We calculate diquark correlation functions in the Landau gauge on the lattice using overlap valence quarks and 2＋1flavor domain wall fermion configurations. Quark masses are extracted from the scalar part of quark propagators in the Landau gauge. The scalar diquark quark mass difference and axial vector scalar diquark mass difference are obtained for diquarks composed of two light quarks and of a strange and a light quark. The light sea quark mass dependence of the results is examined. Two lattice spacings are used to check the discretization effects. The coarse and fine lattices are of sizes 24^3 ×64 and 32^3 ×64 with inverse spacings 1/a= 1.75（4） GeV and 2.33（5） GeV, respectively.We calculate diquark correlation functions in the Landau gauge on the lattice using overlap valence quarks and 2＋1flavor domain wall fermion configurations. Quark masses are extracted from the scalar part of quark propagators in the Landau gauge. The scalar diquark quark mass difference and axial vector scalar diquark mass difference are obtained for diquarks composed of two light quarks and of a strange and a light quark. The light sea quark mass dependence of the results is examined. Two lattice spacings are used to check the discretization effects. The coarse and fine lattices are of sizes 24^3 ×64 and 32^3 ×64 with inverse spacings 1/a= 1.75（4） GeV and 2.33（5） GeV, respectively.

关 键 词：lattice QCD DIQUARKS overlap fermions Landau gauge 

分 类 号：O572.33[理学—粒子物理与原子核物理]