Chemistry and Physics Faculty Articles

Document Type

Article

Publication Date

5-1994

Publication Title

Physical Review D

ISSN

1550-7998

Volume

49

Issue/No.

9

First Page

4882

Last Page

4901

Abstract

In this paper we summarize the minimal supersymmetric standard model as well as the renormalization group equations of its parameters. We proceed to examine the feasibility of the model when the breaking of supersymmetry is parametrized by the soft terms suggested by supergravity theories. In such models, the electroweak symmetry is exact at the tree level and is broken spontaneously at one-loop order. We make the additional assumption that the GUT-inspired relation mb=mτ be valid at the scale where the gauge coupling constants unify, which constrains the value of the top quark mass. For all types of soft breaking terms expected in supergravity theories, we present the results of numerical runs which yield electroweak breaking at the required scale. These yield not only the allowed ranges for the soft supersymmetry breaking parameters, but also the value of the supersymmetric partners' masses. Taking mb=mτ at the unification scale, mb=4.9 GeV, and α3(MZ)=0.118, we find that for models in which global supersymmetry breaking arises solely from soft gaugino masses and bilinear mixing between the two Higgs scalars the top quark mass can be no lighter than ∼ 180 GeV.

Comments

©1994 American Physical Society

DOI

10.1103/PhysRevD.49.4882

Peer Reviewed

Find in your library

Included in

Physics Commons

COinS