6 papers
Lattice artifacts proportional to the quark mass in the QCD running coupling
Marios Costa, Demetrianos Gavriel, Haralambos Panagopoulos +1
Discretization artifacts proportional to the quark mass can limit the precision of strong-coupling determinations in lattice QCD, especially in the presence of heavy quarks. In thi…
Fine-tunings and renormalization of gluino bilinear operators in lattice SYM with Stout-Smeared links
Marios Costa, Panayiotis Kypros Chrysanthis, Constantinos Costa +3
In this paper, we compute the renormalization factors for the gluino and gluon fields, the gauge parameter, the coupling constant, as well as the scalar, pseudoscalar, and axial-ve…
Perturbative determination of improvement on the QCD running coupling
Marios Costa, Demetrianos Gavriel, Haralambos Panagopoulos +1
We present the perturbative results of the discretization errors proportional to the quark mass () on the QCD running coupling within lattice perturbation theory.…
Classification of four-quark operators with under flavor symmetry and their renormalization in a gauge-invariant scheme
Gregoris Spanoudes, Marios Costa, Kyproulla Mitsidi +1
In this paper we study a complete set of scalar and pseudoscalar four-quark operators, with a particular emphasis on their renormalization within a Gauge-Invariant Renormalization…
N=1 Supersymmetric QCD on the lattice using overlap fermions
Marios Costa, Eleni Ioannou, Haralambos Panagopoulos
Using N=1 Supersymmetric QCD (SQCD) as a prototype model, this work presents a formulation of overlap quarks and gluinos on the lattice, with particular emphasis on the constructio…
Supersymmetric QCD on the lattice: Fine-tuning and counterterms for the Yukawa and quartic couplings
M. Costa, H. Herodotou, H. Panagopoulos
In this study, we determine the fine-tuning of parameters in Supersymmetric QCD, discretized on a Euclidean lattice. Our focus is on the renormalization of Yukawa…