On the MSSM Higgsino mass and fine tuning

Abstract

It is often argued that low fine tuning in the MSSM necessarily requires a rather light Higgsino. In this note we show that this need not be the case when a more complete set of soft SUSY breaking mass terms are included. In particular an Higgsino mass term, that correlates the $\mu -$term contribution with the soft SUSY-breaking Higgsino masses, significantly reduces the fine tuning even for Higgsinos in the TeV mass range where its relic abundance means it can make up all the dark matter.

5 pages, 2 figures

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• SARAH 3.2: Dirac Gauginos, UFO output, and more
• SUSY models under siege: LHC constraints and electroweak fine-tuning
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