Is natural higgsino-only dark matter excluded?
Abstract
The requirement of electroweak naturalness in supersymmetric (SUSY) models of particle physics necessitates light higgsinos not too far from the weak scale characterized by m(weak)~ m(W,Z,h)~100 GeV. On the other hand, LHC Higgs mass measurements and sparticle mass limits point to a SUSY breaking scale in the multi-TeV regime. Under such conditions, the lightest SUSY particle is expected to be a mainly higgsino-like neutralino with non-negligible gaugino components (required by naturalness). The computed thermal WIMP abundance in natural SUSY models is then found to be typically a factor 5-20 below its measured value. To gain concordance with observations, either an additional DM particle (the axion is a well-motivated possibility) must be present or additional non-thermal mechanisms must augment the neutralino abundance. We compare present direct and indirect WIMP detection limits to three natural SUSY models based on gravity-, anomaly- and mirage-mediation. We show that the case of natural higgsino-only dark matter where non-thermal production mechanisms augment its relic density, is essentially excluded by a combination of direct detection constraints from PandaX-II, LUX and Xenon-1t experiments, and by bounds from Fermi-LAT/MAGIC observations of gamma rays from dwarf spheroidal galaxies.
- Authors:
-
- Univ. of Oklahoma, Norman, OK (United States)
- Univ. of Wisconsin, Madison, WI (United States)
- Indian Inst. of Science, Bangalore (India); Univ. of Hawaii, Honolulu, HI (United States)
- Publication Date:
- Research Org.:
- Univ. of Hawaii, Honolulu, HI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1598036
- Grant/Contract Number:
- SC0010504
- Resource Type:
- Accepted Manuscript
- Journal Name:
- European Physical Journal. C, Particles and Fields
- Additional Journal Information:
- Journal Volume: 78; Journal Issue: 10; Journal ID: ISSN 1434-6044
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Baer, Howard, Barger, Vernon, Sengupta, Dibyashree, and Tata, Xerxes. Is natural higgsino-only dark matter excluded?. United States: N. p., 2018.
Web. doi:10.1140/epjc/s10052-018-6306-y.
Baer, Howard, Barger, Vernon, Sengupta, Dibyashree, & Tata, Xerxes. Is natural higgsino-only dark matter excluded?. United States. https://doi.org/10.1140/epjc/s10052-018-6306-y
Baer, Howard, Barger, Vernon, Sengupta, Dibyashree, and Tata, Xerxes. Wed .
"Is natural higgsino-only dark matter excluded?". United States. https://doi.org/10.1140/epjc/s10052-018-6306-y. https://www.osti.gov/servlets/purl/1598036.
@article{osti_1598036,
title = {Is natural higgsino-only dark matter excluded?},
author = {Baer, Howard and Barger, Vernon and Sengupta, Dibyashree and Tata, Xerxes},
abstractNote = {The requirement of electroweak naturalness in supersymmetric (SUSY) models of particle physics necessitates light higgsinos not too far from the weak scale characterized by m(weak)~ m(W,Z,h)~100 GeV. On the other hand, LHC Higgs mass measurements and sparticle mass limits point to a SUSY breaking scale in the multi-TeV regime. Under such conditions, the lightest SUSY particle is expected to be a mainly higgsino-like neutralino with non-negligible gaugino components (required by naturalness). The computed thermal WIMP abundance in natural SUSY models is then found to be typically a factor 5-20 below its measured value. To gain concordance with observations, either an additional DM particle (the axion is a well-motivated possibility) must be present or additional non-thermal mechanisms must augment the neutralino abundance. We compare present direct and indirect WIMP detection limits to three natural SUSY models based on gravity-, anomaly- and mirage-mediation. We show that the case of natural higgsino-only dark matter where non-thermal production mechanisms augment its relic density, is essentially excluded by a combination of direct detection constraints from PandaX-II, LUX and Xenon-1t experiments, and by bounds from Fermi-LAT/MAGIC observations of gamma rays from dwarf spheroidal galaxies.},
doi = {10.1140/epjc/s10052-018-6306-y},
journal = {European Physical Journal. C, Particles and Fields},
number = 10,
volume = 78,
place = {United States},
year = {Wed Oct 17 00:00:00 EDT 2018},
month = {Wed Oct 17 00:00:00 EDT 2018}
}
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