Model-Independent Indirect Detection Constraints on Hidden Sector Dark Matter - INSPIRE

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Model-Independent Indirect Detection Constraints on Hidden Sector Dark Matter

Gilly Elor
(
- MIT, Cambridge, CTP
)
,
Nicholas L. Rodd
(
- MIT, Cambridge, CTP
)
,
Tracy R. Slatyer
(
- MIT, Cambridge, CTP
)
,
Wei Xue
(
- MIT, Cambridge, CTP
)

Nov 27, 2015

24 pages

Published in:

JCAP 06 (2016) 024

Published: Jun 10, 2016

e-Print:

1511.08787 [hep-ph]

DOI:

10.1088/1475-7516/2016/06/024

Report number:

MIT-CTP-4742

View in:

ADS Abstract Service

reference search147 citations

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Abstract: (IOP)

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 bar 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.

Note:

Published version. Added analysis on interplay between indirect detection bounds and the Galactic Center GeV excess. Added antiproton ratio bounds

95.35.+d
dark matter: annihilation
dark matter: hidden sector
cross section: annihilation
current: constraint
muon: final state
cascade
cosmic background radiation: power spectrum
electron
photon

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Figures(21)

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