Light Stops in the MSSM: Implications for Photino Dark Matter and Top Quark Decay

Details Light Stops in the MSSM: Implications for Photino Dark Matter and Top Quark Decay Light Stops in the MSSM: Implications for Photino Dark Matter and Top Quark Decay

1994-08-12

arxiv.org/abs/hep-ph/9408280v1

Phys.Lett.B340:74-80,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

11pages, LaTex, UMN-TH-1309/94

Scientific paper

10.1016/0370-2693(94)91300-5

We consider the viability of the minimal supersymmetric standard model with a light ($m_{\tilde t_1} < $ 45 GeV) stop. In order for its relic abundance to be cosmologically significant, the photino as dark matter must be quite close in mass to the stop, $(m_{\tilde t_1} - m_{\tilde \gamma}) \simeq 3 - 7 $ GeV. However, as we show, the photino despite its low mass is virtually undetectable by either direct or indirect means. We also discuss the implications of these masses on the top quark branching ratios.

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