Energetic neutrinos from heavy-neutralino annihilation in the Sun

Details Energetic neutrinos from heavy-neutralino annihilation in the Sun Energetic neutrinos from heavy-neutralino annihilation in the Sun

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phdt........11k&link_type=abstract

Ph.D. Thesis Fermi National Accelerator Lab., Batavia, IL.

Other

Annihilation Reactions, Coherent Scattering, Elementary Particles, Energetic Particles, Halos, Particle Interactions, Solar Neutrinos, Sun, Bosons, Dark Matter, Weak Interactions (Field Theory)

Scientific paper

Neutralinos may be captured in the sun and annihilated therein producing high-energy neutrinos. Present limits on the flux of such neutrinos from underground detectors such as IMB and Kamiokande 2 may be used to rule out certain supersymmetric dark matter candidates, while in many other supersymmetric models the rates are large enough that if neutralinos do reside in the galactic halo, observation of a neutrino signal may be possible in the near future. Neutralinos that are either nearly pure Higgsino or a Higgsino/gaugino combination are generally captured in the sun by coherent scattering off nuclei via exchange of the lightest Higgs boson. If the squark mass is not much greater than the neutralino mass, then capture of neutralinos that are primarily gaugino occurs predominantly by spin-dependent scattering off hydrogen in the sun. The neutrino signal from annihilation of WIMPs with masses in the range of 80 to 1000 GeV in the sun should generally be stronger than that from weakly interacting massive particle (WIMP) annihilation in the earth, and detection rates for mixed-state neutralinos are generally higher than those for Higgsinos or gauginos.

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