Talk presented by Istvan Montvay

Parallel Session: QCD Spectrum and Quark Masses IV

Friday July 2nd, 17.20 - 17.40, Auditorium

Simulation of QCD and other similar theories

Abstract: In quantum chromodynamics one can change the representation of the gauge group for quarks and/or the gauge group itself. Examples of such generalizations are: (a) supersymmetric Yang-Mills theory with gauge group SU(2) or SU(3) and gluinos, which are Majorana fermions in the adjoint representation; (b) QCD with SU(2) colour and quarks in the adjoint representation; (c) QCD with three equal-mass quarks. Experience in recent simulations of these theories by applying the two-step multi-bosonic algorithm is described. Among others, a method for controling the sign of the quark determinant is investigated. Some interesting physics questions in these theories, which are amenable to lattice simulations, are discussed.

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