Implications of a Solar-System Population of Massive 4th Generation Neutrinos for Underground Searches of Monochromatic Neutrino-Annihilation Signals

Details Implications of a Solar-System Population of Massive 4th Generation Neutrinos for Underground Searches of Monochromatic Neutrino-Annihilation Signals Implications of a Solar-System Population of Massive 4th Generation Neutrinos for Underground Searches of Monochromatic Neutrino-Annihilation Signals

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002stin...0287810b&link_type=abstract

Technical Report, PB2003-100596; IHES/M/02/08

Computer Science

Neutrinos, Solar System, Weakly Interacting Massive Particles, Dark Matter, Leptons, Cosmology, Quarks

Scientific paper

It has been recently pointed out that any primary galactic population of Weakly Interacting Massive Particles (WIMP) generates, through collisions with solar matter, a secondary population of 'slow' WIMPs trapped in the inner solar system. We show that taking into account this 'slow' solar-system population dramatically enhances the possibility to probe the existence of stable massive neutrinos (of a 4th generation) in underground neutrino experiments. Though neutrinos, with mass in the 45-90 GeV range, can only represent a sparse subdominant component of galactic cold dark matter, a combination of enhancement factors makes it possible to discriminate their contribution to WIMP annihilation effects in the Earth. Our work suggests that a reanalysis of existing underground neutrino data should be able to bring extremely tight constraints on the possible existence of a stable massive 4th neutrino.

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