The direct detection of boosted dark matter at high energies and PeV events at IceCube

被引：71

作者：

Bhattacharya, A. ^{[1
]}

Gandhi, R. ^{[2
,3
]}

Gupta, A. ^{[2
]}

机构：

[1] Univ Arizona, Dept Phys, Tucson, AZ 85704 USA

[2] Harish Chandra Res Inst, Allahabad 211019, Uttar Pradesh, India

[3] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2015年 / 03期

关键词：

dark matter theory; neutrino detectors; ultra high energy photons and neutrinos; GAMMA-RAY; NEUTRINOS; GALAXIES; CLUSTERS;

D O I：

10.1088/1475-7516/2015/03/027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 chi, created via the decay of a significantly more massive and long-lived non-thermal relic phi, which forms the bulk of DM. If chi 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.

引用

页数：13

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