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Particles and Fields
Eur. Phys. J. C 26, 91-109 (2002)
DOI: 10.1140/epjc/s2002-01034-1

Dynamical symmetry breaking in SYM theories as a non-semiclassical effect

L. Bergamin

Institute for Theoretical Physics, Technical University of Vienna, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria

(Received: 10 January 2002 / Revised version: 13 April 2002 / Published online: 18 October 2002)

We study supersymmetry breaking effects in N=1 SYM from the point of view of quantum effective actions. Restrictions on the geometry of the effective potential from superspace are known to be problematic in quantum effective actions, where explicit supersymmetry breaking can and must be studied. On the other hand the true ground state can be determined from this effective action, only. We study the problem whether some parts of superspace geometry are still relevant for the effective potential and discuss whether the ground states found this way justify a low energy approximation based on this geometry. The answer to both questions is negative. Essentially non-semiclassical effects change the behavior of the auxiliary fields completely and lead to the demand of a new interpretation of superspace geometry. These non-semiclassical effects can break supersymmetry.

© Società Italiana di Fisica, Springer-Verlag 2002