Indirect detection of unstable heavy dark matter
Jun, 19925 pages
Published in:
- Phys.Lett.B 295 (1992) 104-108
- Published: 1992
e-Print:
- hep-ph/9207261 [hep-ph]
Report number:
- UPPSALA-U-PT17-1992
View in:
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Abstract:
Unstable relics with lifetime longer than the age of the Universe could be the dark matter today. Electrons, photons and neutrinos are a natural outcome of their decay and could be searched for in cosmic rays and in -ray and neutrino detectors. I compare the sensitivities of these three types of searches to the mass and lifetime of a generic unstable particle. I show that if the relics constitute our galactic halo and their branching ratios into electron-positrons, photons and neutrinos are comparable, neutrino searches would probe the longest lifetimes for masses \simge 40 \TeV, while electron-positron searches would be better but more uncertain for lighter particles. If instead the relics are not clustered in our halo, neutrinos are more sensitive a probe than -rays for masses \simge 700 \GeV. A 1 \sqkm neutrino telescope should be able to explore lifetimes up to while searching for neutrinos from unstable particles above the atmospheric background.- dark matter
- postulated particle
- mass: lifetime
- lifetime: mass
- neutrino: cosmic radiation
- photon: cosmic radiation
- electron: cosmic radiation
- cosmic radiation: flux
- flux: cosmic radiation
- numerical calculations
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