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    TH Thursday Seminar

    Excitations in hot non-commutative theories

    by E. LOPEZ (CERN)

    → Europe/Zurich
    TH Auditorium (CERN)

    TH Auditorium

    CERN
    Description
    Non-commutative theories show a remarkable mixing between ultraviolet and infrared degrees of freedom. In order to analyse some consequences of this phenomenon in a controllable setting, we study the one-loop dispersion relation for scalar excitations in supersymmetric, non-commutative theories at finite temperature. We find that in N=4 Yang-Mills the low momenta modes have superluminous group velocity for any temperature T>0. In the massless Wess-Zumino model the minimum of the dispersion relation is at non-zero momentum for high enough temperatures and we study the consequences on the phase structure of the theory. We briefly comment on N=2 Yang-Mills at finite density.