Lattice free energy with overlap fermions: A two-loop result
Panagopoulos, Haralambos G.
SourcePhysical Review D - Particles, Fields, Gravitation and Cosmology
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We calculate the two-loop partition function of QCD on the lattice, using the Wilson formulation for gluons and the overlap-Dirac operator for fermions. Direct by-products of our result are the two-loop free energy and average plaquette. Our calculation serves also as a prototype for further higher-loop calculations in the overlap formalism. We present our results as a function of a free parameter M0 entering the overlap actionthe dependence on the number of colors N and fermionic flavors Nf is shown explicitly.