Constraining light dark matter with diffuse X-ray and gamma-ray observations

Essig, Rouven; Kuflik, Eric; McDermott, Samuel D.; Volansky, Tomer; Zurek, Kathryn M.

doi:10.1007/jhep11(2013)193

Cited by 315 publications

(465 citation statements)

References 165 publications

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“…Again, the coupling predicted by the ELDER scenario is consistent with this bound. Null results of searches for anomalous high-energy photons from dark matter annihilation in the Milky Way or its dwarf satellites can also be used to place an upper bound on [22]. The bound is similar to the one implied by the WMAP data, and we do not show it in Fig.…”

Section: Constraintsmentioning

confidence: 59%

Elastically Decoupling Dark Matter

et al. 2016

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We present a novel dark matter candidate, an Elastically Decoupling Relic (ELDER), which is a cold thermal relic whose present abundance is determined by the cross-section of its elastic scattering on Standard Model particles. The dark matter candidate is predicted to have a mass ranging from a few to a few hundred MeV, and an elastic scattering cross-section with electrons, photons and/or neutrinos in the 10 −3 − 1 fb range.

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Section: Constraintsmentioning

confidence: 59%

Elastically Decoupling Dark Matter

et al. 2016

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“…For long-lifetime decaying DM, there are stringent constraints on the decay lifetime from a wide range of indirect searches (e.g. [36][37][38][39][40][41][42][43][44][45]). In general, these constraints are considerably stronger than our limits, probing lifetimes as long as 10 27−28 s. The exception is for MeV − GeV DM decaying to e + e − pairs; these pairs are difficult to detect directly.…”

Section: General Constraints On Dm Decaymentioning

confidence: 99%

General constraints on dark matter decay from the cosmic microwave background

2017

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Precise measurements of the temperature and polarization anisotropies of the cosmic microwave background can be used to constrain the annihilation and decay of dark matter. In this work, we demonstrate via principal component analysis that the imprint of dark matter decay on the cosmic microwave background can be approximately parameterized by a single number for any given dark matter model. We develop a simple prescription for computing this model-dependent detectability factor, and demonstrate how this approach can be used to set model-independent bounds on a large class of decaying dark matter scenarios. We repeat our analysis for decay lifetimes shorter than the age of the universe, allowing us to set constraints on metastable species other than the dark matter decaying at early times, and decays that only liberate a tiny fraction of the dark matter mass energy. We set precise bounds and validate our principal component analysis using a Markov Chain Monte Carlo approach and Planck 2015 data.PACS numbers: 95.35.+d,98.80.Es

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“…This limit can be readily translated to any decaying dark matter model with a line spectrum, such as those studied in Refs. [56][57][58].…”

Section: Dark Matter Constraintsmentioning

confidence: 99%

Almost closing the νMSM sterile neutrino dark matter window with NuSTAR

Perez¹,

Ng²,

Beacom³

et al. 2017

Phys. Rev. D

149

260

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We use NuSTAR observations of the Galactic Center to search for X-ray lines from the radiative decay of sterile neutrino dark matter. Finding no evidence of unknown lines, we set limits on the sterile neutrino mass and mixing angle. In most of the mass range 10-50 keV, these are now the strongest limits, at some masses improving upon previous limits by a factor of ∼ 10. In the νMSM framework, where additional constraints from dark matter production and structure formation apply, the allowed parameter space is reduced by more than half. Future NuSTAR observations may be able to cover much of the remaining parameter space. P r e v io u s X -r a y c o n s t r a in t s M W s a t e ll it e c o u n t s a n d p h a s e s p a c e c o n s t r a in t sNuSTAR GC 2016 FIG. 1. Simplified overview of constraints on νMSM sterile neutrino dark matter in the plane of mass and mixing angle; details are described in Sec. IV, and the experimental constraints included are listed in Fig. 8. For parameters between the gray regions, the observed dark matter abundance can be produced through resonant production in the νMSM. Most of this region is ruled out by constraints from structure formation (blue) or astrophysical X-ray observations (green). Our new constraint (red line and hatched region) is obtained from NuSTAR observations of the GC, and rules out about half of the previously allowed parameter space (white region).

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Constraining light dark matter with diffuse X-ray and gamma-ray observations

Cited by 315 publications

References 165 publications

Elastically Decoupling Dark Matter

Elastically Decoupling Dark Matter

General constraints on dark matter decay from the cosmic microwave background

Almost closing the νMSM sterile neutrino dark matter window with NuSTAR

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