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 $$m_{weak}\sim m_{W,Z,h}\sim 100\hbox { GeV}$$ mweak∼mW,Z,h∼100GeV . On the other hand, LHC Higgs mass measurements an...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-10-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-018-6306-y |
| _version_ | 1828476815113453568 |
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| author | Howard Baer Vernon Barger Dibyashree Sengupta Xerxes Tata |
| author_facet | Howard Baer Vernon Barger Dibyashree Sengupta Xerxes Tata |
| author_sort | Howard Baer |
| collection | DOAJ |
| description | 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 $$m_{weak}\sim m_{W,Z,h}\sim 100\hbox { GeV}$$ mweak∼mW,Z,h∼100GeV . 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. |
| first_indexed | 2024-12-11T06:34:22Z |
| format | Article |
| id | doaj.art-a85288134e454de0a57ad2ceec5d34ab |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-11T06:34:22Z |
| publishDate | 2018-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-a85288134e454de0a57ad2ceec5d34ab2022-12-22T01:17:25ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522018-10-0178101910.1140/epjc/s10052-018-6306-yIs natural higgsino-only dark matter excluded?Howard Baer0Vernon Barger1Dibyashree Sengupta2Xerxes Tata3Department of Physics and Astronomy, University of OklahomaDepartment of Physics, University of WisconsinDepartment of Physics and Astronomy, University of OklahomaDepartment of Physics and Astronomy, University of HawaiiAbstract The requirement of electroweak naturalness in supersymmetric (SUSY) models of particle physics necessitates light higgsinos not too far from the weak scale characterized by $$m_{weak}\sim m_{W,Z,h}\sim 100\hbox { GeV}$$ mweak∼mW,Z,h∼100GeV . 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.http://link.springer.com/article/10.1140/epjc/s10052-018-6306-y |
| spellingShingle | Howard Baer Vernon Barger Dibyashree Sengupta Xerxes Tata Is natural higgsino-only dark matter excluded? European Physical Journal C: Particles and Fields |
| title | Is natural higgsino-only dark matter excluded? |
| title_full | Is natural higgsino-only dark matter excluded? |
| title_fullStr | Is natural higgsino-only dark matter excluded? |
| title_full_unstemmed | Is natural higgsino-only dark matter excluded? |
| title_short | Is natural higgsino-only dark matter excluded? |
| title_sort | is natural higgsino only dark matter excluded |
| url | http://link.springer.com/article/10.1140/epjc/s10052-018-6306-y |
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