Higgsino dark matter in pure gravity mediated supersymmetry

Jason L Evans, Keith A. Olive

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We consider the prospects for the direct detection of dark matter in pure gravity meditation (PGM) models of supersymmetry breaking. Minimal PGM models require only two parameters, the gravitino mass, m3/2, which sets the UV mass for all scalar masses, and tanβ. Gaugino masses are generated through anomaly mediation. Typically the lightest supersymmetric state (the dark matter candidate) is a wino. Here, we consider a one-parameter extension of the minimal model by allowing the Higgs soft masses to deviate from universality. For simplicity, we take these to be equal and use the μ term as a surrogate. We also consider nonuniversal stop masses. When |μ|∼1 TeV, the Higgsino is a viable dark matter candidate when the gravitino mass is of order ∼1 PeV and tanβ≃2. We calculate the spin-dependent and spin-independent cross sections for dark matter scattering on protons. For spin-independent scattering, existing experimental limits place constraints on the PGM parameter space. Much of the currently allowed parameter space lies above the irreducible neutrino background. Thus, future direct detection experiments will be able to probe much of the remaining PGM parameter space.

Original languageEnglish (US)
Article number055026
JournalPhysical Review D
Issue number5
StatePublished - Sep 1 2022
Externally publishedYes

Bibliographical note

Funding Information:
J. L. E. would like to thanks Tsutomu T. Yanagida for useful discussions during the early stages of this work. The work of K. A. O. was supported in part by DOE Grant No. DE-SC0011842 at the University of Minnesota.

Publisher Copyright:
© 2022 authors. Published by the American Physical Society.


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