Light stops in the MSSM: implications for photino dark matter and top quark decay

Keith A. Olive; Serge Rudaz

doi:10.1016/0370-2693(94)91300-5

Light stops in the MSSM: implications for photino dark matter and top quark decay

Keith A. Olive, Serge Rudaz

Physics and Astronomy (Twin Cities)

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Abstract

We consider the viability of the minimal supersymmetric standard model with a light (m_t₁ < 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_t₁ - m_γ) ≅ 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.

Original language	English (US)
Pages (from-to)	74-80
Number of pages	7
Journal	Physics Letters B
Volume	340
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(94)91300-5
State	Published - Dec 1 1994

Bibliographical note

Funding Information:
We would like to thank J. Cline, K. Kainulainen, M. Srednicki, and M. Voloshin for helpful conversations. This work was supportedi n part by the U.S. Department of Energy under contract DE-FGO2-94ER-40823.

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abstract = "We consider the viability of the minimal supersymmetric standard model with a light (mt1 < 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, (mt1 - mγ) ≅ 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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AU - Olive, Keith A.

AU - Rudaz, Serge

N1 - Funding Information: We would like to thank J. Cline, K. Kainulainen, M. Srednicki, and M. Voloshin for helpful conversations. This work was supportedi n part by the U.S. Department of Energy under contract DE-FGO2-94ER-40823.

PY - 1994/12/1

Y1 - 1994/12/1

N2 - We consider the viability of the minimal supersymmetric standard model with a light (mt1 < 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, (mt1 - mγ) ≅ 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.

AB - We consider the viability of the minimal supersymmetric standard model with a light (mt1 < 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, (mt1 - mγ) ≅ 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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Light stops in the MSSM: implications for photino dark matter and top quark decay

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