| Light Hadron Masses from Lattice Quantum Chromodynamics on Asymmetric Lattices with Improved Actions |
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| 作者姓名： | 刘川 马建平 |
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| 作者单位： | [1]DepartmentofPhysics,PekingUniversity,Beijing100871 [2]InstituteofTheoreticalPhysics,ChineseAcademySciences,Beijing100080 |
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| 摘 要： | We simulate lattice quantum chromodynamics on asymmetric lattices with improved actions,where quenching approximation is used.These lattices have a spatial lattice spacing αs at 0.3 and 0.4 fm,and a temporal lattice spacing αt from 0.14 to 0.08fm.The lattice spacing error due to αs is greatly reduced through improving both quark and gluon actions at a certain level.We find that masses of mesons have weak dependence on both lattice spacings,while the αs and αt dependence for baryons is more significant.With suitable modelling of these dependences,we are able to obtain the nucleon masss in agreement with the experiment.
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| 关 键 词： | 格子量子色动力学 轻强子质量 非对称格子 |
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