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Title: Model-independent indirect detection constraints on hidden sector dark matter

Abstract

If dark matter inhabits an expanded ``hidden sector'', annihilations may proceed through sequential decays or multi-body final states. We map out the potential signals and current constraints on such a framework in indirect searches, using a model-independent setup based on multi-step hierarchical cascade decays. While remaining agnostic to the details of the hidden sector model, our framework captures the generic broadening of the spectrum of secondary particles (photons, neutrinos, e+e- and $$\overline{p}$$ p) relative to the case of direct annihilation to Standard Model particles. We explore how indirect constraints on dark matter annihilation limit the parameter space for such cascade/multi-particle decays. We investigate limits from the cosmic microwave background by Planck, the Fermi measurement of photons from the dwarf galaxies, and positron data from AMS-02. The presence of a hidden sector can change the constraints on the dark matter by up to an order of magnitude in either direction (although the effect can be much smaller). We find that generally the bound from the Fermi dwarfs is most constraining for annihilations to photon-rich final states, while AMS-02 is most constraining for electron and muon final states; however in certain instances the CMB bounds overtake both, due to their approximate independence on the details of the hidden sector cascade. We provide the full set of cascade spectra considered here as publicly available code with examples at http://web.mit.edu/lns/research/CascadeSpectra.html.

Authors:
 [1];  [1]; ORCiD logo [1];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1436984
Report Number(s):
MIT-CTP/4742
Journal ID: ISSN 1475-7516; DE−SC00012567; TRN: US1900259
Grant/Contract Number:  
SC0013999; SC00012567
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2016; Journal Issue: 06; 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; cosmic ray theory; dark matter theory; gamma ray theory

Citation Formats

Elor, Gilly, Rodd, Nicholas L., Slatyer, Tracy R., and Xue, Wei. Model-independent indirect detection constraints on hidden sector dark matter. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/06/024.
Elor, Gilly, Rodd, Nicholas L., Slatyer, Tracy R., & Xue, Wei. Model-independent indirect detection constraints on hidden sector dark matter. United States. doi:10.1088/1475-7516/2016/06/024.
Elor, Gilly, Rodd, Nicholas L., Slatyer, Tracy R., and Xue, Wei. Fri . "Model-independent indirect detection constraints on hidden sector dark matter". United States. doi:10.1088/1475-7516/2016/06/024. https://www.osti.gov/servlets/purl/1436984.
@article{osti_1436984,
title = {Model-independent indirect detection constraints on hidden sector dark matter},
author = {Elor, Gilly and Rodd, Nicholas L. and Slatyer, Tracy R. and Xue, Wei},
abstractNote = {If dark matter inhabits an expanded ``hidden sector'', annihilations may proceed through sequential decays or multi-body final states. We map out the potential signals and current constraints on such a framework in indirect searches, using a model-independent setup based on multi-step hierarchical cascade decays. While remaining agnostic to the details of the hidden sector model, our framework captures the generic broadening of the spectrum of secondary particles (photons, neutrinos, e+e- and $\overline{p}$ p) relative to the case of direct annihilation to Standard Model particles. We explore how indirect constraints on dark matter annihilation limit the parameter space for such cascade/multi-particle decays. We investigate limits from the cosmic microwave background by Planck, the Fermi measurement of photons from the dwarf galaxies, and positron data from AMS-02. The presence of a hidden sector can change the constraints on the dark matter by up to an order of magnitude in either direction (although the effect can be much smaller). We find that generally the bound from the Fermi dwarfs is most constraining for annihilations to photon-rich final states, while AMS-02 is most constraining for electron and muon final states; however in certain instances the CMB bounds overtake both, due to their approximate independence on the details of the hidden sector cascade. We provide the full set of cascade spectra considered here as publicly available code with examples at http://web.mit.edu/lns/research/CascadeSpectra.html.},
doi = {10.1088/1475-7516/2016/06/024},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 06,
volume = 2016,
place = {United States},
year = {2016},
month = {6}
}

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Cited by: 31 works
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Figures / Tables:

Figure 1 Figure 1: Left: schematic diagram of a generic hidden sector cascade. The DM, secluded in its own hidden sector, first annihilates to a pair of hidden sector particles. These φn mediators subsequently decay to lighter particles in the hidden sector and finally to SM particles. Here we consider SM =more » {γ, e, µ, τ, b,H,W, g} and n = 0-6 step cascades (where n = 0 refers to the usual case of direct annihilations). Right: an equivalent diagram depicting the case where the DM annihilates through an off-shell heavy mediator; effectively decaying to an n-body state in the hidden sector which then decays to SM particles.« less

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    • Cirelli, Marco; Gouttenoire, Yann; Petraki, Kalliopi
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