Hidden sector dark matter and the Galactic Center gamma-ray excess: a closer look

Escudero, Miguel; Witte, Samuel J.; Hooper, Dan

doi:10.1088/1475-7516/2017/11/042

Title: Hidden sector dark matter and the Galactic Center gamma-ray excess: a closer look

Journal Article · Fri Nov 24 00:00:00 EST 2017 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2017/11/042· OSTI ID:1395487

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CSIC-Univ. de Valencia, Valencia (Spain)
CSIC-Univ. de Valencia, Valencia (Spain); Univ. of California, Los Angeles, CA (United States)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, Chicago, IL (United States)

Stringent constraints from direct detection experiments and the Large Hadron Collider motivate us to consider models in which the dark matter does not directly couple to the Standard Model, but that instead annihilates into hidden sector particles which ultimately decay through small couplings to the Standard Model. We calculate the gamma-ray emission generated within the context of several such hidden sector models, including those in which the hidden sector couples to the Standard Model through the vector portal (kinetic mixing with Standard Model hypercharge), through the Higgs portal (mixing with the Standard Model Higgs boson), or both. In each case, we identify broad regions of parameter space in which the observed spectrum and intensity of the Galactic Center gamma-ray excess can easily be accommodated, while providing an acceptable thermal relic abundance and remaining consistent with all current constraints. Here, we also point out that cosmic-ray antiproton measurements could potentially discriminate some hidden sector models from more conventional dark matter scenarios.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1395487

Report Number(s):: IFIC-17-38; FERMILAB-PUB-17-383-A; arXiv:1709.07002; 1624640

Journal Information:: Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 11; ISSN 1475-7516

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 25 works

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Cited By (8)

Hidden Higgs portal vector dark matter for the Galactic center gamma-ray excess from the two-step cascade annihilation, and muon g − 2 Yang, Kwei-Chou Journal of High Energy Physics, Vol. 2018, Issue 8 https://doi.org/10.1007/jhep08(2018)099	journal	August 2018
Z ′ mediated WIMPs: dead, dying, or soon to be detected? Blanco, Carlos; Escudero, Miguel; Hooper, Dan Journal of Cosmology and Astroparticle Physics, Vol. 2019, Issue 11 https://doi.org/10.1088/1475-7516/2019/11/024	journal	November 2019
Scrutinizing the evidence for dark matter in cosmic-ray antiprotons Cuoco, Alessandro; Heisig, Jan; Klamt, Lukas Physical Review D, Vol. 99, Issue 10 https://doi.org/10.1103/physrevd.99.103014	journal	May 2019
A robust excess in the cosmic-ray antiproton spectrum: Implications for annihilating dark matter Cholis, Ilias; Linden, Tim; Hooper, Dan Physical Review D, Vol. 99, Issue 10 https://doi.org/10.1103/physrevd.99.103026	journal	May 2019
Can the Inflaton Also Be a Weakly Interacting Massive Particle? Hooper, Dan; Krnjaic, Gordan; Long, Andrew J. Physical Review Letters, Vol. 122, Issue 9 https://doi.org/10.1103/physrevlett.122.091802	journal	March 2019
Scrutinizing the evidence for dark matter in cosmic-ray antiprotons Cuoco, Alessandro; Heisig, Jan; Klamt, Lukas arXiv https://doi.org/10.48550/arxiv.1903.01472	text	January 2019
A Robust Excess in the Cosmic-Ray Antiproton Spectrum: Implications for Annihilating Dark Matter Cholis, Ilias; Linden, Tim; Hooper, Dan arXiv https://doi.org/10.48550/arxiv.1903.02549	text	January 2019
$Z'$ Mediated WIMPs: Dead, Dying, or Soon to be Detected? Blanco, Carlos; Escudero, Miguel; Hooper, Dan arXiv https://doi.org/10.48550/arxiv.1907.05893	text	January 2019

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