XXth International Conference on Neutrino Physics and Astrophysics

Poster Abstract


The Many Uses of Upward-Going Muons in Super-K

The highest energy neutrinos observed by the Super-Kamiokande experiment are detected via muons resulting from a neutrino interaction in the rock below coming up through the detector. These neutrinos form the high energy end (typical E_nu ~ 100 GeV) of the atmospheric \nu spectra observed by Super-K, providing an important energy lever arm for determining the parameters involved in the apparent nu_mu <--> nu_tau oscillations. The high energies also provide a powerful tool to investigate alternative scenarios for the nu_mu disappearance, such as nu_mu <--> nu_s or nu decay. Other potential sources of high energy nu are also investigated, such as astrophysical point sources, nu interactions in the galactic plane, or WIMP annihilation. All data which has been collected from the experiment's start in April 1996 through its maintenance shutdown in July 2001 have now been analyzed. Neither alternative disappearance scenarios nor sources other than atmospheric cosmic ray interactions are consistent with the Super-K data.

Based on a paper in preparation.

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