SU(N) gauge theories in the presence of a topological term

Luigi Del Debbio, Haralambos Panagopoulos, Ettore Vicari

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We review recent results on the theta dependence of the ground-state energy and spectrum of four-dimensional SU(N) gauge theories, where theta is the coefficient of the CP-violating topological term F-Fdual in the Lagrangian. In particular, we discuss the results obtained by Monte Carlo simulations of the lattice formulation of QCD, which allow the investigation of theta dependence around theta=0 by determining the moments of the topological charge distribution, and their correlations with other observables. The results for N=3 and larger values of N support the scenario obtained by general large-N scaling arguments.
Original languageEnglish
Article number122005
JournalJournal of Physics: Conference Series
Issue number12
Publication statusPublished - 2008


  • hep-th
  • hep-lat


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