Yudi Santoso

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We re-examine the parameter space of the constrained minimal supersymmetric extension of the Standard Model (CMSSM), taking account of the restricted range of ΩCDMh 2 consistent with the WMAP data. This provides a significantly reduced upper limit on the mass of the lightest supersymmetric particle LSP: mχ <∼ 500 GeV for tanβ <∼ 45 and μ > 0, or tanβ <∼ 30(More)
We present detailed calculations of the χ̃t̃1 coannihilation channels that have the largest impact on the relic χ̃ density in the constrained minimal supersymmetric extension of the Standard Model (CMSSM), in which scalar masses m0, gaugino masses m1/2 and the trilinear soft supersymmetry-breaking parameters A0 are each assumed to be universal at some input(More)
We compare updated predictions for the elastic scattering of supersymmetric neutralino dark matter with the improved experimental upper limit recently published by CDMS II. We take into account the possibility that the π-nucleon Σ term may be somewhat larger than was previously considered plausible, as may be supported by the masses of exotic baryons(More)
We present a likelihood analysis of the parameter space of the constrained minimal supersymmetric extension of the Standard Model (CMSSM), in which the input scalar masses m0 and fermion masses m1/2 are each assumed to be universal. We include the full experimental likelihood function from the LEP Higgs search as well as the likelihood from a global(More)
The neutralino-proton cross section is examined for supergravity models with R-parity invariance with universal and non-universal soft breaking. The region of parameter space that dark matter detectors are currently (or will be shortly) sensitive i.e. (0.1 − 10) × 10−6 pb, is examined. For universal soft breaking (mSUGRA), detectors with sensitivity σχ̃0 1(More)
Coannihilation effects in neutralino relic density calculations are examined for a full range of supersymmetry parameters including large tan β and large A0 for stau, chargino, stop and sbottom coannihilation with the neutralino. Supergravity models possessing grand unification with universal soft breaking (mSUGRA), models with nonuniversal soft breaking in(More)
Specific models of supersymmetry breaking predict relations between the trilinear and bilinear soft supersymmetry breaking parameters A0 and B0 at the input scale. In such models, the value of tan β can be calculated as a function of the scalar masses m0 and the gaugino masses m1/2, which we assume to be universal. The experimental constraints on sparticle(More)