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    Lattice seminar

    The Realization of the Sharpe-Singleton scenario

    by Kim Splittorff (Niels Bohr Institutet)

    → Europe/Zurich
    4/2-011 - TH common room (CERN)

    4/2-011 - TH common room

    CERN

    15
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    Description
    We will discuss the new insights on the phase structure of lattice QCD with Wilson fermions which has emerged from the analytic computation of spectrum of the Wilson Dirac operator at nonzero lattice spacing. In addition to the spontaneous breaking of chiral symmetry, new phase structures known as the Aoki phase and the Sharpe-Singleton scenario can dominate. The new phase transitions arise due to the interplay between the continuum and the chiral limit in lattice QCD with Wilson fermions. The new analytic results are obtained within Wilson chiral perturbation theory and explain, in particular, a long standing puzzle between the phase structure observed in quenched and unquenched lattice simulations.