The atmospheric neutrino flavor ratio from a 3.9 fiducial kiloton-year exposure of Soudan 2

1999/01/15 by The Soudan 2 Collaboration, W.W.M. Allison, G.J. Alner +46 · 17 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ex

paper · pdf · doi:10.1016/s0370-2693(99)00056-8

published as Phys.Lett.B449:137-144,1999 · 15 pages, 4 figures. To be published in Physics Letters B

arxiv created 1999/01/15 · openalex publication_date 1999/03/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report a measurement of the atmospheric neutrino flavor ratio, R, using a sample of quasi-elastic neutrino interactions occurring in an iron medium. The flavor ratio (tracks/showers) of atmospheric neutrinos in a 3.9 fiducial kiloton-year exposure of Soudan 2 is 0.64 +- 0.11 (stat.) +- 0.06 (syst.) of that expected. Important aspects of our main analysis have been checked by carrying out two independent, alternative analyses; one is based upon automated scanning, the other uses a multivariate approach for background subtraction. Similar results are found by all three approaches.

Citations

• Experimental study of the atmospheric neutrino flux

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