Change of θ dependence in 4D SU(N) gauge theories across the deconfinement transition
Panagopoulos, Haralambos G.
SourcePhysical Review Letters
Google Scholar check
MetadataΕμφάνιση πλήρους εγγραφής
We study the dependence of 4D SU(N) gauge theories on the topological θ term at finite temperature T. We exploit the lattice formulation of the theory, presenting numerical results for the expansion of the free energy up to O(θ6), for N=3 and N=6. Our analysis shows that the θ dependence drastically changes across the deconfinement transition: the low-T phase is characterized by a large-N scaling with θ/N as relevant variable, while in the high-T phase the scaling variable is just θ and the free energy is essentially determined by the instanton-gas approximation. © 2013 American Physical Society.