New Insight in Dynamical Symmetry Breaking via Imaginary Part Analysis

Details New Insight in Dynamical Symmetry Breaking via Imaginary Part Analysis New Insight in Dynamical Symmetry Breaking via Imaginary Part Analysis

1997-04-21

arxiv.org/abs/hep-ph/9704367v1

Nucl.Phys. B515 (1998) 522-534

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, Latex, axodraw.sty, epsfig.sty

Scientific paper

10.1016/S0550-3213(97)00767-0

We present a new method solving Schwinger-Dyson equations in gauge theories via imaginary part analysis. The self-consistency equation for the fermion self-energy can be reduced from a numerical unstable eigenvalue problem to a finite dimensional integral which can be solved easily. We can therefore derive relations between the dynamically generated fermion mass, the coupling, the gauge boson mass and the cutoff. For infinite cutoff the fermion mass is independent of the gauge boson mass which should be the relevant scale. Thus for a defined fermion mass it is necessary to incorporate a running coupling constant. Within our framework this is possible in a well defined way. The results are reasonable and in agreement with the renormalization group in the asymptotic regime.

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