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Lattice QCD with the Overlap-Dirac Operator: Its Parameter, and One-Loop Renormalization of Fermionic Currents
C. Alexandrou, E. Follana, H. Panagopoulos +1
We compute the ratio between the scale associated with a lattice formulation of QCD using the overlap-Dirac operator, and . To this end, the one-loop relation bet…
The Infrared behaviour of the gluon propagator in SU(2) and SU(3) without lattice Gribov copies
C. Alexandrou, Ph. de Forcrand, E. Follana
We present lattice results for the gluon propagator for SU(2) and SU(3) in the Laplacian gauge which avoids lattice Gribov copies. In SU(3) we compare with the most recent lattice…
The Gluon Propagator without lattice Gribov copies
C. Alexandrou, Ph. de Forcrand, E. Follana
We study the gluon propagator in quenched lattice QCD using the Laplacian gauge which is free of lattice Gribov copies. We compare our results with those obtained in the Landau gau…
What Can We Learn from QED at Large Couplings?
A. W. Schreiber, R. Rosenfelder, C. Alexandrou
In order to understand QCD at the energies relevant to hadronic physics one requires analytical methods for dealing with relativistic gauge field theories at large couplings. Stron…
One-loop renormalization of fermionic currents with the overlap-Dirac operator
C. Alexandrou, E. Follana, H. Panagopoulos +1
We compute the one-loop lattice renormalization of the two-quark operators , where denotes the generic Dirac matrix, for the lattice formulation of QCD using the over…
Non-Perturbative Mass Renormalization in Quenched QED from the Worldline Variational Approach
C. Alexandrou, R. Rosenfelder, A. W. Schreiber
Following Feynman's successful treatment of the polaron problem we apply the same variational principle to quenched QED in the worldline formulation. New features arise from the de…