A systematic study of hidden sector dark matter: application to the gamma-ray and antiproton excesses

Hooper, Dan; Leane, Rebecca K.; Tsai, Yu-Dai; Wegsman, Shalma; Witte, Samuel J.

doi:10.1007/JHEP07(2020)163

Title: A systematic study of hidden sector dark matter: application to the gamma-ray and antiproton excesses

Journal Article · Thu Jul 23 00:00:00 EDT 2020 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP07(2020)163· OSTI ID:1592144

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Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, IL (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Univ. of Chicago, IL (United States)
Univ. de Valencia (Spain)

In hidden sector models, dark matter does not directly couple to the particle content of the Standard Model, strongly suppressing rates at direct detection experiments, while still allowing for large signals from annihilation. In this paper, we conduct an extensive study of hidden sector dark matter, covering a wide range of dark matter spins, mediator spins, interaction diagrams, and annihilation final states, in each case determining whether the annihilations are s-wave (thus enabling efficient annihilation in the universe today). We then go on to consider a variety of portal interactions that allow the hidden sector annihilation products to decay into the Standard Model. We broadly classify constraints from relic density requirements and dwarf spheroidal galaxy observations. In the scenario that the hidden sector was in equilibrium with the Standard Model in the early universe, we place a lower bound on the portal coupling, as well as on the dark matter’s elastic scattering cross section with nuclei. We apply our hidden sector results to the observed Galactic Center gamma-ray excess and the cosmic-ray antiproton excess. We find that both of these excesses can be simultaneously explained by a variety of hidden sector models, without any tension with constraints from observations of dwarf spheroidal galaxies.

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Research Organization:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); Ministry of Economic Affairs and Digital Transformation of Spain (MINECO)

Grant/Contract Number:: AC02-07CH11359; SC0012567; SC0013999; 80NSSC19K1515; FPA2014-57816-P; FPA2017-85985-P; 690575; 674896

OSTI ID:: 1592144

Alternate ID(s):: OSTI ID: 1712446; OSTI ID: 1824790

Report Number(s):: arXiv:1912.08821; MIT-CTP/5157; FERMILAB-PUB-19-628-A; oai:inspirehep.net:1771880; TRN: US2101845

Journal Information:: Journal of High Energy Physics (Online), Vol. 2020, Issue 7; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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