The Lightest Neutralino in Supersymmetric Standard Model with Arbitrary Higgs Sectors

Details The Lightest Neutralino in Supersymmetric Standard Model with Arbitrary Higgs Sectors The Lightest Neutralino in Supersymmetric Standard Model with Arbitrary Higgs Sectors

1997-01-29

arxiv.org/abs/hep-ph/9701411v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, latex, no figures, minor typographical corrections

Scientific paper

We consider the neutralino mass matrix in a supersymmetric theory based on SU(2) $\times$ U(1) gauge group with arbitrary number of singlet, doublet and triplet Higgs superfields. We derive an upper bound on the mass of the lightest neutralino, and a lower bound on the mass of the heaviest neutralino, in such a theory. Assuming grand unification of the gauge couplings, the upper bound on the mass of the lightest neutralino can be expressed in terms of the gluino mass. For a gluino mass of 200 GeV, the tree level upper bound on the mass of the lightest neutralino is 92 GeV, which increases to 166.5 GeV for a 1 TeV gluino. We also discuss the effect of dominant one-loop radiative corrections on these bounds.

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