Precision Corrections to Supersymmetric Unification

Details Precision Corrections to Supersymmetric Unification Precision Corrections to Supersymmetric Unification

1995-01-12

arxiv.org/abs/hep-ph/9501277v1

Phys.Lett.B348:443-450,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 6 figures included, uses epsf.tex

Scientific paper

10.1016/0370-2693(95)00207-2

We compute the full set of weak-scale gauge and Yukawa threshold corrections in the minimal supersymmetric standard model, including all finite (non-logarithmic) corrections, which we show to be important. We use our results to examine the effects of unification-scale threshold corrections in the minimal and missing-doublet SU(5) models. We work in the context of a unified mass spectrum, with scalar mass M_0 and gaugino mass M_1/2, and find that in minimal SU(5) with squark masses less than one TeV, successful gauge and Yukawa coupling unification requires M_1/2 << M_0 and M_0 \simeq 1 TeV. In contrast, we find that the missing-doublet model permits gauge and Yukawa unification for a wide range of supersymmetric masses.

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