Hidden sector dark matter and the Galactic Center gamma-ray excess: a closer look
Abstract
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.
- Authors:
-
- 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)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1395487
- Report Number(s):
- IFIC-17-38; FERMILAB-PUB-17-383-A; arXiv:1709.07002
Journal ID: ISSN 1475-7516; 1624640
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of Cosmology and Astroparticle Physics
- Additional Journal Information:
- Journal Volume: 2017; Journal Issue: 11; Journal ID: ISSN 1475-7516
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; dark matter experiments; dark matter theory
Citation Formats
Escudero, Miguel, Witte, Samuel J., and Hooper, Dan. Hidden sector dark matter and the Galactic Center gamma-ray excess: a closer look. United States: N. p., 2017.
Web. doi:10.1088/1475-7516/2017/11/042.
Escudero, Miguel, Witte, Samuel J., & Hooper, Dan. Hidden sector dark matter and the Galactic Center gamma-ray excess: a closer look. United States. https://doi.org/10.1088/1475-7516/2017/11/042
Escudero, Miguel, Witte, Samuel J., and Hooper, Dan. 2017.
"Hidden sector dark matter and the Galactic Center gamma-ray excess: a closer look". United States. https://doi.org/10.1088/1475-7516/2017/11/042. https://www.osti.gov/servlets/purl/1395487.
@article{osti_1395487,
title = {Hidden sector dark matter and the Galactic Center gamma-ray excess: a closer look},
author = {Escudero, Miguel and Witte, Samuel J. and Hooper, Dan},
abstractNote = {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.},
doi = {10.1088/1475-7516/2017/11/042},
url = {https://www.osti.gov/biblio/1395487},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 11,
volume = 2017,
place = {United States},
year = {Fri Nov 24 00:00:00 EST 2017},
month = {Fri Nov 24 00:00:00 EST 2017}
}
Web of Science
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Works referencing / citing this record:
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