Scaling behavior and positivity violation of the gluon propagator in full QCD

被引：137
作者：
Bowman, Patrick O.
Heller, Urs M.
Leinweber, Derek B.
Parappilly, Maria B.
Sternbeck, Andre
von Smekal, Lorenz
Williams, Anthony G.
Zhang, Jianbo
机构：
[1] Massey Univ, Ctr Theoret Chem & Phys, Inst Fundamental Sci, Auckland, New Zealand
[2] Amer Phys Soc, New York, NY 11961 USA
[3] Univ Adelaide, Dept Phys, Special Res Ctr Subatom Struct Matter CSSM, Adelaide, SA 5005, Australia
[4] Flinders Univ S Australia, Sch Chem Phys & Earth Sci, Adelaide, SA 5001, Australia
[5] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
来源：
PHYSICAL REVIEW D | 2007年 / 76卷 / 09期
关键词：
D O I：
10.1103/PhysRevD.76.094505
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The Landau-gauge gluon propagator is studied using the coarse and fine dynamical MILC configurations. The effects of dynamical quarks are clearly visible and lead to a reduction of the nonperturbative infrared enhancement relative to the quenched case. Lattice spacing effects are studied and found to be small. The gluon spectral function is shown to clearly violate positivity in both quenched and full QCD.
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页数：7
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