Invisible decays of the supersymmetric higgs and dark matter

Boudjema, F. ; Belanger, G. ; Godbole, R. M. (2002) Invisible decays of the supersymmetric higgs and dark matter Arxiv-eprints . pp. 1-17.

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We discuss effects of the light sparticles on decays of the lightest Higgs in a supersymmetric model with nonuniversal gaugino masses at the high scale, focusing on the invisible f decays into neutralinos. These can impact significanlty the discovery possibilities of the lightest Higgs at the LHC. We show that due to these decays, there exist regions of the M2-μ space where the B.R. (h→γγ) becomes dangerously low even after imposing the LEP constraints on the sparticle masses, implying a possible preclusion of its discovery in the γγ channel. We find that there exist regions in the parameter space with acceptable relic density and where the ratio B.R.(h→γγ)SUSY/ B.R.(h→γγ)SM falls below 0.6, implying loss of signal γγ in the channel. These regions correspond to χ~+1, χ~02 masses which should be accessible already at the Tevatron. Further we find that considerations of relic density put lower limit on the U(1) gaugino mass parameter M1 independently of μ tan β and m0.

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Deposited On:22 Jun 2012 09:49
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