We explore the sparticle and Higgs spectroscopy of an SU(5) inspired extension of the constrained minimal supersymmetric standard model (CMSSM). The universal soft parameter m 0 is replaced by m5 and m 10 , where m5 and m 10 denote universal soft scalar masses associated with fields in the five and ten dimensional representations of SU(5). The special case m5 ≪ m 10 yields a rather characteristic sparticle spectroscopy which can be tested at the LHC. We highlight a few benchmark points in which the lightest neutralino saturates the WMAP bound on cold dark matter abundance.
We investigate neutralino dark matter in supersymmetric flipped SU(5), focusing on candidates with masses of order 30 -150 GeV and spin independent cross sections that are consistent with the most recent CDMS II results. We assume gravity mediated supersymmetry breaking and restrict the magnitude of the soft supersymmetry breaking mass parameters to 1 TeV or less. With non-universal soft gaugino and Higgs masses, and taking flipped SU(5) into account, we identify allowed regions of the parameter space and highlight some benchmark solutions including Higgs and sparticle spectroscopy.
We explore the Higgs and sparticle spectroscopy of supersymmetric SU (4) c × SU (2) L × SU (2) R models in which the three MSSM gauge couplings and third family (t-b-τ ) Yukawa couplings are all unified at M GUT . This class of models can be obtained via compactification of a higher dimensional theory. Allowing for opposite sign gaugino masses and varying m t within 1σ of its current central value yields a variety of gauge-Yukawa unification as well as WMAP compatible neutralino dark matter solutions. They include mixed bino-Higgsino dark matter, stau and gluino coannihilation scenarios, and the A-resonance solution.
We identify a variety of coannihilation scenarios in a supersymmetric SU(4) c × SU(2) L × SU(2) R model with discrete left-right symmetry. Non-universal gaugino masses, compatible with the gauge symmetry, play an essential role in realizing gluino and bino-wino coannihilation regions that are consistent with the WMAP dark matter constraints. We also explore regions of the parameter space in which the little hierarchy problem is partially resolved. We present several phenomenologically interesting benchmark points and the associated sparticle and Higgs mass spectra.
We show compatibility with all known experimental constraints of t − b − τ Yukawa coupling unification in supersymmetric SU (4)c × SU (2)L × SU (2)R which has non-universal gaugino masses and the MSSM parameter µ < 0. In particular, the relic neutralino abundance satisfies the WMAP bounds and ∆(g − 2)µ is in good agreement with the observations. We identify benchmark points for the sparticle spectra which can be tested at the LHC, including those associated with gluino and stau coannihilation channels, mixed bino-Higgsino state and the A-funnel region. We also briefly discuss prospects for testing Yukawa unification with the ongoing and planned direct detection experiments.
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