Signature of relic heavy stable neutrinos in underground experiments

Details Signature of relic heavy stable neutrinos in underground experiments Signature of relic heavy stable neutrinos in underground experiments

1998-10-03

arxiv.org/abs/astro-ph/9810048v1

JETP Lett. 68 (1998) 685-690

Astronomy and Astrophysics

Astrophysics

12 pages, 3 figures

Scientific paper

10.1134/1.567929

Considering heavy stable neutrinos of 4th generation we calculate the relic density of such neutrinos in the Universe. Taking into account the condensation of heavy neutrinos in the Galaxy and applying the results of calculations to experimental data from underground experiments on search for WIMPs in elastic neutral current scattering on nuclei we found an exclusion region of neutrino mass 60 GeV < m < 290 GeV. The bounds obtained from present underground experiments while confirming the previous bounds derived from analysis of cosmic ray spectra are more relible ones. We discuss also the first indication of elastic scattering induced by WIMP in DAMA experiment finding a very narrow window of neutrino mass 45 GeV < m < 50 GeV compatible with the possible signal rate in the detector.

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