Browsing by Author "Del Debbio, L."

Now showing items 1-9 of 9

    • 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  

      Free energy and θ dependence of SU (N) gauge theories 

      Del Debbio, L.; Panagopoulos, Haralambos G.; Vicari, E. (2003)
      We study the dependence of the free energy on the CP violating angle θ, in four-dimensional SU(N) gauge theories with N ≥ 3, and in the large-N limit. Using the Wilson lattice formulation for numerical simulations, we ...
    • Article  

      Higher representations on the lattice: Perturbative studies 

      Del Debbio, L.; Frandsen, M. T.; Panagopoulos, Haralambos G.; Sannino, F. (2008)
      We present analytical results to guide numerical simulations with Wilson fermions in higher representations of the colour group. The ratio of Λ parameters, the additive renormalization of the fermion mass, and the ...
    • Article  

      K-string tensions in SU(N) gauge theories 

      Del Debbio, L.; Panagopoulos, Haralambos G.; Rossi, P.; Vicari, E. (2002)
      In the context of four-dimensional SU(N) gauge theories, we study the spectrum of the confining strings. We compute, for the SU(6) gauge theory formulated on a lattice, the three independent string tensions σk related to ...
    • Article  

      The proton matrix element of the topological charge in quenched QCD 

      Allés, B.; Campostrini, M.; Del Debbio, L.; Di Giacomo, A.; Panagopoulos, Haralambos G.; Vicari, E. (1994)
      We compute on the lattice the on-shell proton matrix element of the topological charge density in the quenched approximation. Our calculation makes use of a nonperturbative means of determining the multiplicative renormalization ...
    • 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  

      Spectrum of k-string tensions in SU(N) gauge theories 

      Del Debbio, L.; Panagopoulos, Haralambos G.; Rossi, P.; Vicari, E. (2002)
      We compute, for the four-dimensional SU(4) and SU(6) gauge theories formulated on a lattice, the string tensions σκ related to sources with ZN charge κ, using Monte Carlo simulations. Our results are compatible with σκ ∝ ...
    • 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 ...