Landau Pole Effects and the Parameter Space of the Minimal Supergravity Model

Details Landau Pole Effects and the Parameter Space of the Minimal Supergravity Model Landau Pole Effects and the Parameter Space of the Minimal Supergravity Model

1995-02-24

arxiv.org/abs/hep-ph/9502388v1

Phys.Rev.D52:4169-4177,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages,Tex, including 4 figures available on request

Scientific paper

10.1103/PhysRevD.52.4169

It is shown that analyses at the electroweak scale can be significantly affected due to Landau pole effects in certain regions of the parameter space. This phenomenon arises due to a large magnification of errors of the input parameters $m_t$, $\alpha_G$ which have currently a 10 percent uncertainty in their determination. The influence of the Landau pole on the constraint that the scalar SUSY spectrum be free of tachyons is also investigated.It is found that this constraint is very strong and eliminates a large portion of the parameter space.Under the above constraint the trilinear soft SUSY breaking term at the electroweak scale is found to lie in a restricted domain.

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