Invisible Decays of the Supersymmetric Higgs and Dark Matter

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dc.creatorBoudjema, F.
dc.creatorBélanger, G.
dc.creatorGodbole, R. M.
dc.date2002-06-28
dc.date.accessioned2026-07-07T03:47:20Z
dc.date.available2026-07-07T03:47:20Z
dc.descriptionWe 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' 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 $M_2-μ$ space where the B.R. $(h \to γγ)$ 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 ${B.R. (h \to γγ)_{SUSY} \over B.R. (h \to γγ)_{SM}}$ falls below 0.6, implying loss of signal in the $γγ$ channel. These regions correspond to $\tilde χ_1^+, \tilde χ_2^0$ 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 $M_1$ independently of $μ, \tan β$ and $m_0$.
dc.description17 pages, 11 figures, Talk presented at Appi2002, Accelerator and Particle Physics Institute, Appi, Iwate, Japan, February 13--16 2002
dc.identifierhttps://arxiv.org/abs/hep-ph/0206311
dc.identifierhttp://arxiv.org/abs/hep-ph/0206311
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/41627
dc.subjectHigh Energy Physics - Phenomenology
dc.titleInvisible Decays of the Supersymmetric Higgs and Dark Matter
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