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Return of the Light Higgsino

Manuel Drees
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Abstract

It is pointed out that loop corrections involving heavy quarks and their superpartners can re-introduce a state with 99.5% higgsino purity as a viable cold Dark Matter candidate. Such corrections can increase the mass splitting between the three higgsino-like states of the MSSM by several GeV, which results in a suppression of the co-annihilation rate by a factor of five or more. Related corrections to the couplings of the LSP to $Z$ and Higgs bosons can change the predicted LSP detection rate by two orders of magnitude.

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Manuel Drees. 1997-01-17. Return of the Light Higgsino. https://arxiv.org/abs/hep-ph/9701318

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