Higgsinos in SUSY Models with Gaugino Mass Unification

Details Higgsinos in SUSY Models with Gaugino Mass Unification Higgsinos in SUSY Models with Gaugino Mass Unification

1999-02-16

arxiv.org/abs/hep-ph/9902352v2

Phys.Lett. B456 (1999) 171-178

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages in LaTeX with 4 encapsulated postscript figures; uses epsf.sty. Version to appear in Physics Letters B

Scientific paper

10.1016/S0370-2693(99)00501-8

In the MSSM, the assumptions of a common sfermion mass parameter m_0 and a common gaugino mass parameter m_1/2, along with the requirements from radiative electroweak symmetry breaking, lead to relatively large values of the Higgs mixing parameter mu, and consequently to a gaugino-like lightest neutralino. Lifting the requirement that the Higgs mass parameters unify with the sfermion masses is known to allow for smaller mu. We show that a mu parameter sufficiently small to yield a Higgsino-like neutralino requires a precise adjustment of the Higgs mass parameter m_Hu. Consequently a gaugino-type neutralino is still preferred in SUSY models with gaugino mass unification.

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