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In supersymmetric models where the magnitude of the GUT scale gaugino massparameter M_3 is suppressed relative to M_1 and M_2, the lightest neutralinocan be a mixed higgsino-bino state with a thermal relic abundance in agreementwith the WMAP central value for \Omega_{\rm CDM} h^2 and consistent with allother phenomenological constraints. In these models, the gluino can be as lightas 200 GeV without conflicting with the LEP2 bounds on the chargino mass. Thus,gluino pair production can be accessible at the Fermilab Tevatron at highrates. In this framework, gluinos decay radiatively with a large branchingfraction to a gluon plus a neutralino. We find that experiments at the FermilabTevatron, with 5 fb^{-1} of integrated luminosity, will be sensitive to gluinopair production in the m_{\tg}\sim 200-350 GeV range via the multi-jet+etmissing and multi-jet +\ell^+\ell^- + etmissing channels at the 5\sigmalevel, while trilepton signatures are expected to be below this level ofdetectability. Dilepton mass edges from both \tz_2 and \tz_3 decays may bemeasurable in the dilepton + multi-jet +etmissing channel.Comment: 14 pages including 6 EPS figure

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Probing supersymmetry beyond the reach of LEP2 at the Fermilab Tevatron: Low<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo stretchy="false">|</mml:mo><mml:msup><mml:mi>M</mml:mi><mml:mn>3</mml:mn></mml:msup><mml:mo stretchy="false">|</mml:mo></mml:math>dark matter models

Probing supersymmetry beyond the reach of LEP2 at the Fermilab Tevatron: Low|M3|dark matter models