Unquenched Effects and Quark Mass Dependence of LatticeGluon Propagator in Infrared Region |
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| Authors: | ZHANG Yan-Bin PING Jia-Lun LÜ Xiao-Fu ZONG Hong-Shi |
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| Affiliation: | 1. Department of Physics, Nanjing University, Nanjing 210093, China;2. Joint Center for Particle, Nuclear Physics and Cosmology,Nanjing 210093, China;3. Department of Physics, Nanjing Normal University,Nanjing 210097, China;4. Department of Physics, Sichuan University, Chengdu 610064, China |
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| Abstract: | In this paper, the gluon propagator in Landau gauge has been studiedon a lattice, including the quenched and the unquenched one. Thesmall geometry size of lattice we use is 163×32, and thebig one is 203×64. For the quenched approximation, we fitthe numerical results and give a little different fitting values. We also obtain unquenched effects by comparing the gluon propagator resulting from the quenched and unquenched configurations, for both the two-flavor and three-flavor cases. For the unquenchedconfigurations, an obvious quark mass dependence has not been found inthe small quark mass case, but is found in the three-flavor case when the quark mass is big. |
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| Keywords: | lattice gluon propagator quenching effect mass dependence infrared region |
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