Browsing by Subject "Lattice Gauge Field Theories"

Now showing items 1-8 of 8

    • Article  

      The 4D SU(3) gauge theory with an imaginary θ term 

      Panagopoulos, Haralambos G.; Vicari, E. (2011)
      We study the scaling behavior of the 4D SU(3) lattice gauge theory in the presence of a θ term, by Monte Carlo simulations computing the topological properties at imaginary θ. The numerical results provide a good evidence ...
    • Article  

      Confining strings in representations with common n-ality 

      Del Debbio, L.; Vicari, E.; Panagopoulos, Haralambos G. (2003)
      We study the spectrum of confining strings in SU(3) pure gauge theory, by means of lattice Monte Carlo simulations, using torelon operators in different representations of the gauge group. Our results provide direct evidence ...
    • Article  

      First moment of the flavour octet nucleon parton distribution function using lattice QCD 

      Alexandrou, Constantia; Constantinou, Martha; Dinter, S.; Drach, V.; Hadjiyiannakou, Kyriakos; Jansen, K.; Koutsou, Giannis; Vaquero, A. (2015)
      Abstract: We perform a lattice computation of the flavour octet contribution to the average quark momentum in the nucleon, (Formula presented.). In particular, we fully take the disconnected contributions into account in ...
    • Article  

      O(a 2) corrections to the one-loop propagator and bilinears of clover fermions with Symanzik improved gluons 

      Constantinou, Martha G.; Lubicz, V.; Panagopoulos, Haralambos G.; Stylianou, Fotos S. (2009)
      We calculate corrections to the fermion propagator and to the Green's functions of all fermion bilinear operators of the form , to one-loop in perturbation theory. We employ the Wilson/clover action for fermions and the ...
    • Article  

      Spectrum of confining strings in SU(N) gauge theories 

      Del Debbio, L.; Panagopoulos, Haralambos G.; Rossi, P.; Vicari, E. (2002)
      We study the spectrum of the confining strings in four-dimensional SU(N) gauge theories. We compute, for the SU(4) and SU(6) gauge theories formulated on a lattice, the string tensions σk related to sources with ZN charge ...
    • Article  

      Topological susceptibility of SU(N) gauge theories at finite temperature 

      Debbio, L. D.; Panagopoulos, Haralambos G.; Vicari, E. (2004)
      We investigate the large-N behavior of the topological susceptibility χ in four-dimensional SU(N) gauge theories at finite temperature, and in particular across the finite-temperature transition at Tc. For this purpose, ...
    • Article  

      θ dependence of SU (N) gauge theories 

      Del Debbio, L.; Panagopoulos, Haralambos G.; Vicari, E. (2002)
      We study the θ dependence of four-dimensional SU(N) gauge theories, for N ≥ 3 and in the large-N limit. We use numerical simulations of the Wilson lattice formulation of gauge theories to compute the first few terms of the ...
    • Article  

      θ Dependence of the spectrum of SU(N) gauge theories 

      Del Debbio, L.; Manca, G. M.; Panagopoulos, Haralambos G.; Skouroupathis, A.; Vicari, E. (2006)
      We study the θ dependence of the spectrum of four-dimensional SU(N) gauge theories, where θ is the coefficient of the topological term in the Lagrangian, for N 3 and in the large-N limit. We compute the O(θ2) terms of the ...