An analysis is given of the effects of nonuniversal soft supersymmetry-breaking masses in the Higgs sector and in the third generation squark sector, and it is shown that they are highly coupled. Nonuniversality effects on dark matter event rates in neutralino-nucleus scattering are analyzed. It is found that the effects are maximal in the range mχ̃1<~65 GeV where the relic density is governed by the Z and Higgs poles. In this range the minimum event rates can be increased or decreased by factors of ∼10 depending on the sign of nonuniversality. Above this range Landau pole effects arising from the heavy top quark mass tend to suppress the nonuniversality effects. The effect of more precise measurements of cosmological parameters on event rates, which is expected to occur in the next round of COBE-like satellite experiments, is also investigated. Implications for the analysis for dark matter searches are discussed.


Originally published in Physical Review D v.56 (1997): 2820-2832. DOI: 10.1103/PhysRevD.56.2820


Higgs sector, squark sector, neutralino-nucleus scattering

Subject Categories

Supersymmetry, Broken symmetry (Physics), Dark matter (Astronomy)




American Physical Society

Publication Date


Rights Information

Copyright (1997) American Physical Society

Rights Holder

American Physical Society

Click button above to open, or right-click to save.

Included in

Physics Commons