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Title: 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:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]
  1. CSIC-Univ. de Valencia, Valencia (Spain)
  2. CSIC-Univ. de Valencia, Valencia (Spain); Univ. of California, Los Angeles, CA (United States)
  3. 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}
}

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Cited by: 25 works
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Works referenced in this record:

Effective theories for Dark Matter interactions and the neutrino portal paradigm
journal, July 2015


Cosmic abundances of stable particles: Improved analysis
journal, August 1991


Millisecond pulsars and the Galactic Center gamma-ray excess: the importance of luminosity function and secondary emission
journal, February 2015


Simple J-factors and D-factors for indirect dark matter detection
text, January 2016


Flavored Dark Matter and the Galactic Center Gamma-Ray Excess
text, January 2014


The Galactic Center Excess from the Bottom Up
text, January 2014


Model-Independent Indirect Detection Constraints on Hidden Sector Dark Matter
text, January 2015


A realistic model for Dark Matter interactions in the neutrino portal paradigm
text, January 2016


PeV-Scale Dark Matter as a Thermal Relic of a Decoupled Sector
text, January 2016


Indirect Dark Matter Detection for Flattened Dwarf Galaxies
text, January 2016


Dark Forces in the Sky: Signals from Z' and the Dark Higgs
text, January 2016


Works referencing / citing this record:

Z ′ mediated WIMPs: dead, dying, or soon to be detected?
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Scrutinizing the evidence for dark matter in cosmic-ray antiprotons
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A robust excess in the cosmic-ray antiproton spectrum: Implications for annihilating dark matter
journal, May 2019


Can the Inflaton Also Be a Weakly Interacting Massive Particle?
journal, March 2019


Scrutinizing the evidence for dark matter in cosmic-ray antiprotons
text, January 2019


$Z'$ Mediated WIMPs: Dead, Dying, or Soon to be Detected?
text, January 2019