The direct detection of boosted dark matter at high energies and PeV events at IceCube
- Univ. of Arizona, Tucson, AZ (United States)
- Harish-Chandra Research Institute, Jhunsi, Allahabad (India); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Harish-Chandra Research Institute, Jhunsi, Allahabad (India)
We study the possibility of detecting dark matter directly via a small but energetic component that is allowed within present-day constraints. Drawing closely upon the fact that neutral current neutrino nucleon interactions are indistinguishable from DM-nucleon interactions at low energies, we extend this feature to high energies for a small, non-thermal but highly energetic population of DM particle χ, created via the decay of a significantly more massive and long-lived non-thermal relic Φ, which forms the bulk of DM. If χ interacts with nucleons, its cross-section, like the neutrino-nucleus coherent cross-section, can rise sharply with energy leading to deep inelastic scattering, similar to neutral current neutrino-nucleon interactions at high energies. Thus, its direct detection may be possible via cascades in very large neutrino detectors. As a specific example, we apply this notion to the recently reported three ultra-high energy PeV cascade events clustered around 1 – 2 PeV at IceCube (IC). We discuss the features which may help discriminate this scenario from one in which only astrophysical neutrinos constitute the event sample in detectors like IC.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- FG02-04ER41298; FG02-13ER41976
- OSTI ID:
- 1214549
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 03; ISSN 1475-7516
- Publisher:
- Institute of Physics (IOP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
End of the cosmic neutrino energy spectrum
|
journal | December 2014 |
Constraining very heavy dark matter using diffuse backgrounds of neutrinos and cascaded gamma rays
|
journal | October 2012 |
Neutrinos at IceCube from heavy decaying dark matter
|
journal | July 2013 |
High-energy neutrinos from active galactic nuclei
|
journal | May 1991 |
A Galactic Halo Origin of the Neutrinos Detected by IceCube | text | January 2014 |
Neutrino yield from Galactic cosmic rays | text | January 2014 |
Pinpointing Extragalactic Neutrino Sources in Light of Recent IceCube Observations | text | January 2014 |
Strongest model-independent bound on the lifetime of Dark Matter | text | January 2014 |
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