10 citations · 20 across the 4 of their papers we have counts for
8 papers · 1 filter
O(a^2) corrections to the propagator and bilinears of Wilson / clover fermions
Martha Constantinou, Haralambos Panagopoulos, Fotos Stylianou
We present the corrections to the fermion propagator, to second order in the lattice spacing, O(a^2), in 1-loop perturbation theory. The fermions are described by the clover action…
Two-loop additive mass renormalization with clover fermions and Symanzik improved gluons
A. Skouroupathis, M. Constantinou, H. Panagopoulos
We calculate the critical value of the hopping parameter, , in Lattice QCD, up to two loops in perturbation theory. We employ the Sheikholeslami-Wohlert (clover) improved acti…
Gauge theories with overlap fermions in an arbitrary representation: Evaluation of the 3-loop beta-function
M. Constantinou, H. Panagopoulos
This work presents the calculation of the relation between the bare coupling constant g_0 and the MSbar-renormalized coupling g_MS, g_0 = Z_g(g_0,aμ) g_MS, to 2 loops in perturbati…
The three-loop beta-function of SU(N) lattice gauge theories with overlap fermions
Martha Constantinou, Haralambos Panagopoulos
We briefly report our calculation of the 2-loop coefficient of the coupling constant renormalization function Z_g in lattice perturbation theory. The quantity under study is define…
QCD with overlap fermions: Running coupling and the 3-loop beta-function
M. Constantinou, H. Panagopoulos
We calculate the relation between the bare coupling constant g_0 and the MSbar-renormalized coupling g_MS: g_0 = Z_g(g_0,a μ) g_MS, to 2 loops in perturbation theory. We employ the…
Improving perturbation theory with cactus diagrams
Martha Constantinou, Haralambos Panagopoulos, Apostolos Skouroupathis
We study a systematic improvement of perturbation theory for gauge fields on the lattice [hep-lat/0606001]; the improvement entails resumming, to all orders in the coupling constan…