出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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 U4 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, λC-gauge. This λCgauge is expected to be a useful gauge for modeling effective theories such as the quark potential model.
