Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-07-14
JHEP0410:066,2004
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 page file plus 9 figures; updated version to coincide with published version
Scientific paper
10.1088/1126-6708/2004/10/066
Supersymmetric grand unified models based on the gauge group SO(10) are especially attractive in light of recent data on neutrino masses. The simplest SO(10) SUSY GUT models predict unification of third generation Yukawa couplings in addition to the usual gauge coupling unification. Recent surveys of Yukawa unified SUSY GUT models predict an inverted scalar mass hierarchy in the spectrum of sparticle masses if the superpotential mu term is positive. In general, such models tend to predict an overabundance of dark matter in the universe. We survey several solutions to the dark matter problem in Yukawa unified supersymmetric models. One solution-- lowering the GUT scale mass value of first and second generation scalars-- leads to u_R and c_R squark masses in the 90-120 GeV regime, which should be accessible to Fermilab Tevatron experiments. We also examine relaxing gaugino mass universality which may solve the relic density problem by having neutralino annihilations via the Z or h resonances, or by having a wino-like LSP.
Auto Daniel
Baer Howard
Belyaev Alexander
Krupovnickas Tadas
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