• Conference Object  

      The electric dipole moment of the neutron from Nf = 2+1+1 twisted mass fermions 

      Petschlies, Marcus; Alexandrou, Constantia; Athenodorou, A.; Constantinou, Martha; Hadjiyiannakou, Kyriakos; Jansen, K.; Koutsou, Giannis; Ottnad, K. (Proceedings of Science (PoS), 2015)
      We extract the neutron electric dipole moment (nEDM) dn on configurations produced with Nf = 2+1+1 twisted mass fermions with lattice spacing of a ≃ 0.082fm and a light quark mass that correpsonds to Mπ ≃ 373 MeV. We do ...
    • Article  

      Higher loop results for the plaquette, using the clover and overlap actions 

      Athenodorou, A.; Panagopoulos, Haralambos G.; Tsapalis, Antonios (2005)
      We calculate the perturbative value of the free energy in QCD on the lattice. This quantity is directly related to the average plaquette. Our calculation is done to 3 loops using the clover action for fermions
    • Article  

      Large Wilson loops with overlap and clover fermions: Two-loop evaluation of the b-quark mass shift and the quark-antiquark potential 

      Athenodorou, A.; Panagopoulos, Haralambos G. (2008)
      We compute, to two loops in perturbation theory, the fermionic contribution to rectangular R × T Wilson loops, for different values of R and T. We use the overlap fermionic action. We also employ the clover action, for ...
    • Article  

      The lattice free energy of QCD with clover fermions, up to three-loops 

      Athenodorou, A.; Panagopoulos, Haralambos G.; Tsapalis, Antonios (2008)
      We calculate the perturbative value of the free energy in Lattice QCD, up to three loops. Our calculation is performed using Wilson gluons and the Sheikholeslami-Wohlert (clover) improved action for fermions. The free ...
    • Article  

      Lattice free energy with overlap fermions: A two-loop result 

      Athenodorou, A.; Panagopoulos, Haralambos G. (2004)
      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 ...
    • Article  

      Neutron electric dipole moment using Nf=2+1+1 twisted mass fermions 

      Petschlies, Marcus; Alexandrou, Constantia; Athenodorou, A.; Constantinou, Martha; Hadjiyiannakou, Kyriakos; Jansen, K.; Koutsou, Giannis; Ottnad, K. (2016)
      We evaluate the neutron electric dipole moment |d→N| using lattice QCD techniques. The gauge configurations analyzed are produced by the European Twisted Mass Collaboration using Nf=2+1+1 twisted mass fermions at one value ...
    • Article  

      Topological charge using cooling and the gradient flow 

      Alexandrou, Constantia; Athenodorou, A.; Jansen, K. (2015)
      The equivalence of cooling to the gradient flow when the cooling step nc and the continuous flow step of gradient flow τ are matched is generalized to gauge actions that include rectangular terms. By expanding the link ...