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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3471
DTSTART:20141002T193000Z
DTEND:20141002T203000Z
DTSTAMP:20260419T161514Z
LAST-MODIFIED:20140924T185509Z
LOCATION:5280 Chamberlin
SUMMARY:Astrophysical neutrinos\, PeV events at IceCube\, and the Dire
 ct Detection of Dark Matter\, NPAC (Nuclear/Particle/Astro/Cosmo) Foru
 m\, Raj Gandhi\, HRI\, India and Fermi National Accelerator Laboratory
DESCRIPTION:Given present day constraints\, dark matter (DM) may not c
 omprise of thermal weakly interacting massive particles (WIMPS). Drawi
 ng closely upon the fact that neutral  current neutrino nucleon intera
 ctions are indistinguishable from DM-nucleon interactions at low energ
 ies\,  we study the consequences of extending this feature to high  en
 ergies for a small\, non-thermal but highly energetic  population of D
 M 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 Ï
 ‡ interacts with nucleons\, it is possible that its cross-section\, li
 ke the neutrino-nucleus coherent cross-section\, may rise sharply with
  energy leading to deep inelastic scattering\, similar to neutral curr
 ent neutrino-nucleon interactions at high energies. Thus\, its direct 
 detection may be possible via cascades in very large neutrino detector
 s. IceCube (IC) has recently reported three ultra-high energy PeV casc
 ade events clustered around 1-2 PeV. We apply this notion to these eve
 nts  and  discuss the  features which may help discriminate this scena
 rio from one in which only astrophysical neutrinos constitute the IC e
 vent sample.
URL:https://www.physics.wisc.edu/events/?id=3471
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