325 research outputs found
Smooth Hybrid Inflation and Non-Thermal Type II Leptogenesis
We consider a smooth hybrid inflation scenario based on a supersymmetric
SU(2)_L x SU(2)_R x U(1)_B-L model. The Higgs triplets involved in the model
play a key role in inflation as well as in explaining the observed baryon
asymmetry of the universe. We show that the baryon asymmetry can originate via
non-thermal triplet leptogenesis from the decay of SU(2)_L triplets, whose tiny
vacuum expectation values also provide masses for the light neutrinos.Comment: 9 pages, 2 figure
Split Sfermion Families, Yukawa Unification and Muon g-2
We consider two distinct classes of Yukawa unified supersymmetric SO(10)
models with non-universal and universal soft supersymmetry breaking (SSB)
gaugino masses at M_{\rm GUT}. In both cases, we assume that the third family
SSB sfermion masses at M_{\rm GUT} are different from the corresponding
sfermion masses of the first two families (which are equal). For the SO(10)
model with essentially arbitrary (non-universal) gaugino masses at M_{\rm GUT},
it is shown that t-b-\tau Yukawa coupling unification is compatible, among
other things, with the 125 GeV Higgs boson mass, the WMAP relic dark matter
density, and with the resolution of the apparent muon g-2 anomaly. The colored
sparticles in this case all turn out to be quite heavy, of order 5 TeV or more,
but the sleptons (smuon and stau) can be very light, of order 200 GeV or so.
For the SO(10) model with universal gaugino masses and NUHM2 boundary
conditions, the muon g-2 anomaly cannot be resolved. However, the gluino in
this class of models is not too heavy, \lesssim 3 TeV, and therefore may be
found at the LHC.Comment: 19 pages, 6 figures, 2 table
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