Higgsino Dark Matter Confronts 14 Years of Fermi -Ray Data
Abstract
Thermal Higgsino dark matter (DM), with mass around 1 TeV, is a well-motivated, minimal DM scenario that arises in supersymmetric extensions of the standard model. Higgsinos may naturally be the lightest superpartners in split-supersymmetry models that decouple the scalar superpartners while keeping Higgsinos and gauginos close to the TeV scale. Higgsino DM may annihilate today to give continuum γ-ray emission at energies less than a TeV in addition to a linelike signature at energies equal to the mass. Previous searches for Higgsino DM, for example with the H.E.S.S. γ-ray telescope, have not reached the necessary sensitivity to probe the Higgsino annihilation cross section. In this work we make use of 14 years of data from the Fermi Large Area Telescope at energies above ~10 GeV to search for the continuum emission near the Galactic Center from Higgsino annihilation. We interpret our results using DM profiles from Milky Way analog galaxies in the FIRE-2 hydrodynamic cosmological simulations. We set the strongest constraints to date on Higgsino-like DM. Our results show a mild, ~2σ preference for Higgsino DM with a mass near the thermal Higgsino mass and, depending on the DM density profile, the expected cross section.
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1973882
- Alternate Identifier(s):
- OSTI ID: 2234119
- Grant/Contract Number:
- DESC0019225; AC02-05CH11231; 39083149; SC0019225
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Name: Physical Review Letters Journal Volume: 130 Journal Issue: 20; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; gamma ray astronomy; particle astrophysics; particle dark matter; supersymmetric models; supersymmetry; weakly interacting massive particles
Citation Formats
Dessert, Christopher, Foster, Joshua W., Park, Yujin, Safdi, Benjamin R., and Xu, Weishuang Linda. Higgsino Dark Matter Confronts 14 Years of Fermi γ -Ray Data. United States: N. p., 2023.
Web. doi:10.1103/PhysRevLett.130.201001.
Dessert, Christopher, Foster, Joshua W., Park, Yujin, Safdi, Benjamin R., & Xu, Weishuang Linda. Higgsino Dark Matter Confronts 14 Years of Fermi γ -Ray Data. United States. https://doi.org/10.1103/PhysRevLett.130.201001
Dessert, Christopher, Foster, Joshua W., Park, Yujin, Safdi, Benjamin R., and Xu, Weishuang Linda. Tue .
"Higgsino Dark Matter Confronts 14 Years of Fermi γ -Ray Data". United States. https://doi.org/10.1103/PhysRevLett.130.201001.
@article{osti_1973882,
title = {Higgsino Dark Matter Confronts 14 Years of Fermi γ -Ray Data},
author = {Dessert, Christopher and Foster, Joshua W. and Park, Yujin and Safdi, Benjamin R. and Xu, Weishuang Linda},
abstractNote = {Thermal Higgsino dark matter (DM), with mass around 1 TeV, is a well-motivated, minimal DM scenario that arises in supersymmetric extensions of the standard model. Higgsinos may naturally be the lightest superpartners in split-supersymmetry models that decouple the scalar superpartners while keeping Higgsinos and gauginos close to the TeV scale. Higgsino DM may annihilate today to give continuum γ-ray emission at energies less than a TeV in addition to a linelike signature at energies equal to the mass. Previous searches for Higgsino DM, for example with the H.E.S.S. γ-ray telescope, have not reached the necessary sensitivity to probe the Higgsino annihilation cross section. In this work we make use of 14 years of data from the Fermi Large Area Telescope at energies above ~10 GeV to search for the continuum emission near the Galactic Center from Higgsino annihilation. We interpret our results using DM profiles from Milky Way analog galaxies in the FIRE-2 hydrodynamic cosmological simulations. We set the strongest constraints to date on Higgsino-like DM. Our results show a mild, ~2σ preference for Higgsino DM with a mass near the thermal Higgsino mass and, depending on the DM density profile, the expected cross section.},
doi = {10.1103/PhysRevLett.130.201001},
journal = {Physical Review Letters},
number = 20,
volume = 130,
place = {United States},
year = {Tue May 16 00:00:00 EDT 2023},
month = {Tue May 16 00:00:00 EDT 2023}
}
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