Non-Universal GUT Corrections to the Soft Terms and their Implications in Supergravity Models

Abstract

Potentially large non-universal corrections to the soft supersymmetry breaking parameters arise from their evolution between the Planck and the grand-unification scales. We detail typical patterns of non-universality in GUT models, as well as elaborate on their propagation to the weak scale and on their low-energy implications. Possible corrections to the different scalar quark and lepton masses and the Higgs and the gaugino-Higgsino sector parameters are described in detail, and new allowed regions of the parameter space are pointed out. In particular, the patterns studied often lead to heavier Higgsinos and $t$-scalar. One-loop GUT threshold corrections to the soft parameters are also discussed and shown to be important.

30 pages, LaTex + RevTex 3, uuencoded postscript file (including 13 figures) is attached. Also available via anonymous ftp from dept.physics.upenn.edu @dir pub\Nir (as a .uu or .ps file). Preprint No. UPR-0627-T

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