Horizontal muons and a search for AGN neutrinos in Soudan 2.

Abstract We measure the horizontal (|cos( θ z )| E μ >1.8 GeV) in Soudan 2 to be 4.01 ± 0.50 ± 0.30 × 10 −13 cm −2  sr −1  s −1 . From the absence of horizontal muons with large energy loss, we set a limit on the flux of muon neutrinos from active galactic nuclei.