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Anisotropy of the primary cosmic-ray flux in Super-Kamiokande

Yuichi Oyama

astro-pharXiv:astro-ph/0605020

Abstract

A first-ever 2-dimensional celestial map of primary cosmic-ray flux was obtained from 2.10x108 cosmic-ray muons accumulated in 1662.0 days of Super-Kamiokande. The celestial map indicates an (0.104 0.020)% excess region in the constellation of Taurus and a -(0.094 0.014)% deficit region toward Virgo. Interpretations of this anisotropy are discussed.

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