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    TH Thursday Seminar

    The elusive lightness of theta vacuum

    by M. ASOREY (University of Zaragoza)

    → Europe/Zurich
    SL Auditorium (CERN)

    SL Auditorium

    CERN
    Description
    We shall discuss some features of CP symmetry on theta = 0, pi vacua of gauge theories and CPn sigma-models. The existence of phase transitions and spontaneous breaking of CP symmetry are analyzed by novel non-perturbative analytic techniques. The elusive sector of theta = pi vacuum physics is shown to exhibit peculiar properties. Theta vacuum in the large N limit is lighter than expected.