Dark Matter Decay to a Photon and a Neutrino: the Double Monochromatic Smoking Gun Scenario

Abstract

In the energy range from few TeV to 25 TeV, upper bounds on the dark matter decay rate into high energy monochromatic neutrinos have recently become comparable to those on monochromatic gamma-ray lines. This implies clear possibilities of a future double "smoking-gun" evidence for the dark matter particle, from the observation of both a gamma and a neutrino line at the same energy. In particular, we show that a scenario where both lines are induced from the same dark matter particle decay leads to correlations that can already be tested. We study this "double monochromatic" scenario by considering the complete list of lowest dimensional effective operators that could induce such a decay. Furthermore, we argue that, on top of lines from decays into two-body final states, three-body final states can also be highly relevant. In addition to producing a distinct hard photon spectrum, three-body final states also produce a line-like feature in the neutrino spectrum that can be searched for by neutrino telescopes.

16 pages, 11 figures, 3 tables

References in corpus (14)

• The spectrum of isotropic diffuse gamma-ray emission between 100 MeV and 820 GeV
• Cosmology and Astrophysics of Minimal Dark Matter
• Atmospheric and Astrophysical Neutrinos above 1 TeV Interacting in IceCube
• Search for photon line-like signatures from Dark Matter annihilations with H.E.S.S
• Decaying Dark Matter can explain the electron/positron excesses
• Milagro Observations of Multi-TeV Emission from Galactic Sources in the Fermi Bright Source List
• IceCube events and decaying dark matter: hints and constraints
• Constraints on decaying dark matter from the extragalactic gamma-ray background
• The Sensitivity of HAWC to High-Mass Dark Matter Annihilations
• Universally Leptophilic Dark Matter From Non-Abelian Discrete Symmetry
• Multipole analysis of IceCube data to search for dark matter accumulated in the Galactic halo
• Sharp Gamma-ray Spectral Features from Scalar Dark Matter Annihilations
• Bremsstrahlung and Gamma Ray Lines in 3 Scenarios of Dark Matter Annihilation
• Can a millicharged dark matter particle emit an observable gamma-ray line?

Cited by in corpus (18)

• Gamma-ray Constraints on Decaying Dark Matter and Implications for IceCube
• A Search for Dark Matter in the Galactic Halo with HAWC
• Cosmological bounds on dark matter-photon coupling
• Low energy IceCube data and a possible Dark Matter related excess
• Millicharge or Decay: A Critical Take on Minimal Dark Matter
• The case for decaying spin-3/2 dark matter
• Prospects for discovering a neutrino line induced by dark matter annihilation
• Indirect searches of dark matter via polynomial spectral features
• IC at IC: IceCube can constrain the intrinsic charm of the proton
• Neutrino lines from DM decay induced by high-scale seesaw interactions
• Dark matter produced from neutrinos
• Constraints on Dark Matter-Photon Coupling in the Presence of Time-Varying Dark Energy
• A Spectroscopic Search for Optical Emission Lines from Dark Matter Decay
• Gamma-ray lines may reveal the CP nature of the dark matter particle
• Beyond Standard Neutrino Theory
• Search for dark matter using sub-PeV $\mathbf{\gamma }$-rays observed by Tibet AS${}_{\mathbf{\gamma }}$
• Polynomial Spectrum of Gamma Ray from Dark Matter
• LHAASO Galactic Plane $\gamma$-rays Strongly Constrain Heavy Dark Matter