Type of Document	Dissertation
Author	Auto, Daniel M.
Author's Email Address	auto@hep.fsu.edu
URN	etd-11152004-160708
Title	Yukawa Unification in SO(10) SUSY GUTs
Degree	Doctor of Philosophy
Department	Physics, Department of
Advisory Committee	Advisor Name Title Howard Baer Committee Chair Christopher Hunter Committee Member Harrison Prosper Committee Member Jorge Piekarewicz Committee Member Laura Reina Committee Member
Keywords	SUSY GUT Supersymmetry Phenomenology Supersymmetric Standard Model Yukawa Unification SO(10) Symmetry
Date of Defense	2004-08-31
Availability	unrestricted
Abstract Yukawa coupling unification to less than 5\% can occur for $m_{16}$ {it and} $m_{1/2} agt 1-2$~TeV. Consistency of negative $mu$ Yukawa unified models with $b o sgamma$, $(g-2)_mu$, and relic density $Omega h^2$ all imply very large values of $m_{1/2}$ typically greater than about 2.5 TeV, in which case direct detection of sparticles may be a challenge even at the LHC. To address the tension between Yukawa unification and the excess of dark matter that the $mu >0$ models tend to predict, a couple of possible improvements are surveyed. 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. Another possibility is 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.
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