Browsing by Author "Feo, A."

Now showing items 1-15 of 15

    • Article  

      The 3-loop beta function of QCD 

      Allés, B.; Christou, Chris; Feo, A.; Panagopoulos, Haralambos G.; Vicari, E. (1997)
      Using the background field technique, we calculate the 3-loop beta function of lattice SU (N) gauge theories. In the pure gluonic case, we present our results, comparing to those recently obtained by Luescher and Weisz. ...
    • Article  

      Asymptotic scaling corrections in QCD with Wilson fermions from the 3-loop average plaquette 

      Allés, B.; Feo, A.; Panagopoulos, Haralambos G. (1998)
      We calculate the 3-loop perturbative expansion of the average plaquette in lattice QCD with Nf massive Wilson fermions and gauge group SU(N). The corrections to asymptotic scaling in the corresponding energy scheme are ...
    • Article  

      Deconfinement phase transition in one-flavor QCD 

      Alexandrou, Constantia; Boriçi, A.; Feo, A.; De Forcrand, P.; Galli, A.; Jegerlehner, F.; Takaishi, T. (1999)
      We present a study of the deconfinement phase transition of one-flavor QCD using the multiboson algorithm. The mass of the Wilson fermions relevant for this study is moderately large and the non-Hermitian multiboson method ...
    • Article  

      Erratum: Asymptotic scaling corrections in QCD with Wilson fermions from the 3-loop average plaquette (Physics Letters, Section B: Nuclear, Elementary Particle (1998) 426 (361)) 

      Allés, B.; Feo, A.; Panagopoulos, Haralambos G. (2003)
    • Article  

      Lattice multiplicative renormalization beyond 1-loop 

      Allés, B.; Campostrini, M.; Feo, A.; Panagopoulos, Haralambos G. (1994)
      This is a progress report on a computational scheme for the perturbative evaluation of lattice renormalization functions. This scheme, implemented as a package on a symbolic manipulation computer language, has already ...
    • Article  

      Lattice perturbation theory by computer algebra: A three-loop result for the topological susceptibility 

      Allés, B.; Campostrini, M.; Feo, A.; Panagopoulos, Haralambos G. (1994)
      We present a scheme for the analytic computation of renormalization functions on the lattice, using a symbolic manipulation computer language. Our first nontrivial application is a new three-loop result for the topological ...
    • Article  

      One-flavour QCD at finite temperature 

      Alexandrou, Constantia; Boriçi, A.; Feo, A.; De Forcrand, P.; Galli, A.; Jegerlehner, F.; Takaishi, T. (1998)
      We present results, for heavy to moderate quark masses, of a study of thermodynamic properties of 1-flavour QCD, using the multiboson algorithm. Finite-size scaling behaviour is studied on lattices of size 83 × 4, 123 × 4 ...
    • Article  

      Phase structure of one-flavour QCD 

      Alexandrou, Constantia; Boriçi, A.; Feo, A.; de Forcrand, Ph; Galli, A.; Jegerlehner, F.; Takaishi, T. (1999)
      We present a study of the deconfinement phase transition of one-flavour QCD, using the multiboson algorithm. The mass of the Wilson fermions relevant for this study is moderately large and the non-Hermitian multiboson ...
    • Article  

      Thermodynamics of 1-flavor QCD 

      Alexandrou, Constantia; Boriçi, A.; Feo, A.; De Forcrand, P.; Galli, A.; Jegerlehner, F.; Takaishi, T. (1997)
      We present first results, for heavy to moderate quark masses, of a study of thermodynamic properties of 1-flavor QCD, using the multiboson algorithm.
    • Article  

      The three-loop lattice free energy 

      Allés, B.; Campostrini, M.; Feo, A.; Panagopoulos, Haralambos G. (1994)
      We calculate the free energy of SU(N) gauge theories on the lattice, to three loops. Our result, combined with Monte Carlo data for the average plaquette, gives a more precise estimate of the gluonic condensate. © 1994.
    • Article  

      Three-loop results in QCD with Wilson fermions 

      Allés, B.; Christou, Chris; Feo, A.; Panagopoulos, Haralambos G.; Vicari, E. (1998)
      We calculate the third coefficient of the lattice beta function in QCD with Wilson fermions, extending the pure gauge results of Lüscher and Weisz
    • Article  

      Three-loop results on the lattice 

      Allés, B.; Campostrini, M.; Feo, A.; Panagopoulos, Haralambos G. (1993)
      We present some new three-loop results in lattice gauge theories, for the Free Energy and for the Topological Susceptibility. These results are an outcome of a scheme which we are developing (using a symbolic manipulation ...
    • Article  

      The three-loop β function in SU(N) lattice gauge theories 

      Allés, B.; Feo, A.; Panagopoulos, Haralambos G. (1997)
      We calculate the third coefficient of the lattice β function in pure Yang-Mills theory. We make use of a computer code for solving perturbation theory analytically on the lattice. We compute the divergent integrals by using ...
    • Article  

      The three-loop β-function of SU(N) lattice gauge theories with Wilson fermions 

      Christou, Chris; Feo, A.; Panagopoulos, Haralambos G.; Vicari, E. (1998)
      We calculate the third coefficient of the lattice β-function associated with the Wilson formulation for both gauge fields and fermions. This allows us to evaluate the three-loop correction (linear in g2 0) to the relation ...
    • Article  

      The two-loop relation between the bare lattice coupling and the MS coupling in QCD with Wilson fermions 

      Christou, Chris; Feo, A.; Panagopoulos, Haralambos G.; Vicari, E. (1998)
      We calculate the two-loop relation between the coupling renormalized in the MS̄ scheme and the bare lattice coupling g0 in QCD with Wilson fermions, extending the pure gauge results of Lüscher and Weisz. Our calculation ...