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  1. No Access

    Article

    SU(2) lattice gauge theory: Standard action versus Symanzik's tree-improved action

    We carry out Monte Carlo simulations of the 4d SU(2) lattice gauge theory. The standard action and the Symanzik tree-improved action are used. Results for the string tension, glueball masses, and energy-momentum ...

    B. Berg, A. Billoire, S. Meyer… in Communications in Mathematical Physics (1985)

  2. No Access

    Article

    A note on γ traces for the Wilson action in the continuum limit

    In d=4 and d=2 dimensions we calculate averages of certain products of γ matrices \((\pi (1 \pm \gamma _\mu )\rangle _L \) ...

    B. Berg, A. Billoire, D. Foerster in Letters in Mathematical Physics (1982)

  3. No Access

    Article

    ExactS-matrix of the adjoint SU(N) representation

    We have calculated the exact factorisedS-matrices of the adjoint SU(N) representation in 1+1 space-time dimensions. Besides the trivial solution the only realised solution exhibits anO(N 2−1) symmetry.

    B. Berg, P. Weisz in Communications in Mathematical Physics (1979)

  4. No Access

    Article

    Computation of quantum fluctuations around multi-instanton fields from exact Green's functions: TheCP n−1 Case

    We calculate exactly the contribution of instanton fields to the partition function of ℂℙ n−1 models in two dimensions. Forn=2, the pure instanton gas is infrared finite, infinitely dense and generates a mass dyn...

    B. Berg, M. Lüscher in Communications in Mathematical Physics (1979)