scholarly journals Detection of Ultra-High Energy neutrinos skimming the Earth due to decay of superheavy dark matter at JEM-EUSO

2019 ◽  
Vol 24 ◽  
pp. 100299
Author(s):  
Ye Xu
Keyword(s):  
Dark Matter ◽  
High Energy ◽  
Ultra High Energy ◽  
The Earth ◽  
High Energy Neutrinos ◽  
Ultra High Energy Neutrinos ◽  
Superheavy Dark Matter

scholarly journals Superheavy dark matter from string theory

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Rouzbeh Allahverdi ◽  
Igor Bröckel ◽  
Michele Cicoli ◽  
Jacek K. Osiński
Keyword(s):  
Dark Matter ◽  
High Energy ◽  
Late Time ◽  
Ultra High Energy ◽  
String Compactifications ◽  
String Models ◽  
The Right ◽  
Ultra High Energy Neutrinos ◽  
Superheavy Dark Matter ◽  
Breaking Scale

Abstract Explicit string models which can realize inflation and low-energy supersymmetry are notoriously difficult to achieve. Given that sequestering requires very specific configurations, supersymmetric particles are in general expected to be very heavy implying that the neutralino dark matter should be overproduced in a standard thermal history. However, in this paper we point out that this is generically not the case since early matter domination driven by string moduli can dilute the dark matter abundance down to the observed value. We argue that generic features of string compactifications, namely a high supersymmetry breaking scale and late time epochs of modulus domination, might imply superheavy neutralino dark matter with mass around 1010–1011 GeV. Interestingly, this is the right range to explain the recent detection of ultra-high-energy neutrinos by IceCube and ANITA via dark matter decay.

scholarly journals Radio Phased Arrays for the Detection of Ultra-High Energy Neutrinos

2019 ◽  
Vol 216 ◽  
pp. 04008
Author(s):  
Eric Oberla
Keyword(s):  
Phased Array ◽  
Austral Summer ◽  
High Energy ◽  
Ultra High Energy ◽  
Dipole Antennas ◽  
Radio Detection ◽  
Trigger Efficiency ◽  
High Energy Neutrinos ◽  
Band Limited ◽  
Ultra High Energy Neutrinos

Ground-based radio arrays offer a promising future for the measurement of ultra-high energy neutrinos, including the prospect of reducing the radio-detection energy threshold to a level necessary to overlap with the high-energy range probed by IceCube (~1016 eV). Here we describe a phased array of antennas and beamforming electronics, which serves as a highly sensitive and directional trigger system for nanosecond-scale plane wave impulses. A prototype in-ice phased array was successfully installed during the 2017/18 austral summer at the South Pole in collaboration with the Askaryan Radio Array (ARA). The trigger array is a compact string of 7 in-ice dipole antennas deployed at a depth of 200 m, whose signals are continuously digitized at the surface using 1.5 GSa/s ADCs with 7-bit resolution. We measure a 50% trigger efficiency on band-limited impulses with signal-to-noise ratios of 2.0 or smaller.

scholarly journals Constraints on the flux of ultra-high energy neutrinos from Westerbork Synthesis Radio Telescope observations

2010 ◽  
Vol 521 ◽  
pp. A47 ◽  
Author(s):  
S. Buitink ◽  
O. Scholten ◽  
J. Bacelar ◽  
R. Braun ◽  
A. G. de Bruyn ◽  
...  
Keyword(s):  
Radio Telescope ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Neutrinos ◽  
Ultra High Energy Neutrinos

Limits on the Diffuse Flux of Ultra-High Energy Neutrinos from the RICE Experiment

2003 ◽  
Author(s):  
J. Adams ◽  
Chris Allen ◽  
A. Bean ◽  
David Z. Besson ◽  
D. J. Box ◽  
...  
Keyword(s):  
High Energy ◽  
Ultra High Energy ◽  
Diffuse Flux ◽  
High Energy Neutrinos ◽  
Ultra High Energy Neutrinos
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