Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2010-10-28
PoS Lattice2010:277,2010
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 6 figures, talk given at the XXVIII International Symposium on Lattice Field Theory, Lattice 2010, June 14-19, 2010,
Scientific paper
Using generalized Landau gauge, we study the continuous change of gluon properties from the Landau gauge toward the Coulomb gauge in SU(3) lattice QCD. We investigate "instantaneous interquark potential", which is defined by the spatial correlation of the temporal link-variable $U_4$ and is an interesting gauge-dependent concept. In the Coulomb gauge, the instantaneous potential is expressed by the Coulomb plus linear potential, where the slope is, however, 2-3 times as large as the physical string tension. In the Landau gauge, the instantaneous potential has no linear part. We find that the linear part is continuously growing by varying gauge from the Landau gauge toward the Coulomb gauge. We also find that the instantaneous potential approximately reproduces the physical interquark potential in a specific intermediate gauge, $\lambda_C$-gauge. This $\lambda_C$-gauge is expected to be a useful gauge for modeling effective theories such as the quark potential model.
Iritani Takumi
Suganuma Hideo
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