出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We study the gluon and ghost propagators of lattice Landau gauge in the strong coupling limit
b = 0 in pure SU(2) lattice gauge theory to find evidence of the conformal infrared behavior of
these propagators as predicted by a variety of functional continuum methods for asymptotically
small momenta q2 L2
QCD. In the strong-coupling limit, this same behavior is obtained for the
larger values of a2q2 (in units of the lattice spacing a), where it is otherwise swamped by the
gauge field dynamics. Deviations for a2q2 < 1 are well parametrized by a transverse gluon mass
µ 1=a. Perhaps unexpectedly, these deviations are thus no finite-volume effect but persist in the
infinite-volume limit. They furthermore depend on the definition of gauge fields on the lattice,
while the asymptotic conformal behaviour does not.
