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Title: Prospects for axion detection in natural SUSY with mixed axion-higgsino dark matter: back to invisible?

Journal Article · · Journal of Cosmology and Astroparticle Physics

Under the expectation that nature is natural, we extend the Standard Model to include SUSY to stabilize the electroweak sector and PQ symmetry to stabilize the QCD sector. Then natural SUSY arises from a Kim-Nilles solution to the SUSY μ problem which allows for a little hierarchy where μ~ $$f$$ $$^{2}_{a}$$/MP~ 100-300 GeV while the SUSY particle mass scale mSUSY~ 1-10 TeV >> μ. Dark matter then consists of two particles: a higgsino-like WIMP and a SUSY DFSZ axion. The range of allowed axion mass values ma depends on the mixed axion-higgsino relic density. Here, the range of ma is actually restricted in this case by limits on WIMPs from direct and indirect detection experiments. We plot the expected axion detection rate at microwave cavity experiments. The axion-photon-photon coupling is severely diminished by charged higgsino contributions to the anomalous coupling. In this case, the axion may retreat, at least temporarily, back into the regime of near invisibility. From our results, we urge new ideas for techniques which probe both deeper and more broadly into axion coupling versus axion mass parameter space.

Research Organization:
Univ. of Oklahoma, Norman, OK (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0009956
OSTI ID:
1777467
Report Number(s):
arXiv:1705.01134; TRN: US2209466
Journal Information:
Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 06; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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