122 citations · 206 across the 10 of their papers we have counts for
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Gauge-invariant renormalization of four-quark operators
M. Constantinou, M. Costa, H. Herodotou +2
We study the renormalization of four-quark operators in one-loop perturbation theory. We employ a coordinate-space Gauge-Invariant Renormalization Scheme (GIRS), which can be advan…
Fine-Tuning of the Yukawa and Quartic Couplings in Supersymmetric QCD
M. Costa, H. Herodotou, H. Panagopoulos
In this work, we investigate the fine tuning of parameters in Supersymmetric QCD, discretized on a Euclidean lattice. Specifically, we study the renormalization o…
Nonperturbative renormalization of the supercurrent in Supersymmetric Yang-Mills Theory
Georg Bergner, Marios Costa, Haralambos Panagopoulos +3
In this work, we study the nonperturbative renormalization of the supercurrent operator in Supersymmetric Yang-Mills (SYM) theory, using a gauge-invariant renorma…
Gauge-invariant renormalization of fermion bilinears and energy-momentum tensor on the lattice
G. Spanoudes, M. Costa, I. Karpasitis +4
We study a gauge-invariant renormalization scheme (GIRS) for composite operators, regularized on the lattice, by extending the coordinate space (X-space) scheme proposed some years…
Gauge-invariant Renormalization Scheme in QCD: Application to fermion bilinears and the energy-momentum tensor
M. Costa, I. Karpasitis, G. Panagopoulos +4
We consider a gauge-invariant, mass-independent prescription for renormalizing composite operators, regularized on the lattice, in the spirit of the coordinate space (X-space) reno…
Supersymmetric QCD on the Lattice: An Exploratory Study
M. Costa, H. Panagopoulos
We perform a pilot study of the perturbative renormalization of a Supersymmetric gauge theory with matter fields on the lattice. As a specific example, we consider Supersymmetric $…
Singlet vs Nonsinglet Perturbative Renormalization of Fermion Bilinears
M. Constantinou, M. Hadjiantonis, H. Panagopoulos +1
In this paper we present the perturbative evaluation of the difference between the renormalization functions of flavor singlet and nonsinglet bilinear quark operators on the lattic…
Perturbatively improving RI-MOM renormalization constants
M. Constantinou, M. Costa, M. Gockeler +6
The determination of renormalization factors is of crucial importance in lattice QCD. They relate the observables obtained on the lattice to their measured counterparts in the cont…
Renormalization constants for one-derivative fermion operators in twisted mass QCD
C. Alexandrou, M. Constantinou, T. Korzec +2
We present perturbative and non-perturbative results on the renormalization constants of the local and one-derivative vector and axial vector operators. Non-perturbative results ar…
Non-perturbative renormalization of quark bilinear operators with Nf=2 (tmQCD) Wilson fermions and the tree-level improved gauge action
M. Constantinou, P. Dimopoulos, R. Frezzotti +8
We present results for the renormalization constants of bilinear quark operators obtained by using the tree-level Symanzik improved gauge action and the Nf=2 twisted mass fermion a…