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Title: Atmospheric results from Super-Kamiokande

Recent results from a 282 kiloton-year exposure of the Super-Kamiokande detector to atmospheric neutrinos are presented. The data when fit both by themselves and in conjunction with constraints from the T2K and reactor neutrino experiments show a weak, though insignificant, preference for the normal mass hierarchy at the level of~ 1σ. Searches for 2 evidence of oscillations into a sterile neutrino have resulted in limits on the parameters governing their mixing, |U{sub μ4}|{sup 2} < 0.041 and |U{sub τ4}|{sup 2} < 0.18 at 90% C.L. A similar search for an indication of Lorentz-invariance violating oscillations has yielded limits three to seven orders of magnitude more stringent than existing measurements. Additionally, analyses searching for an excess of neutrinos in the atmospheric data produced from the annihilation of dark matter particles in the galaxy and sun have placed tight limits on the cross sections governing their annihilation and scattering.
Authors:
 [1]
  1. Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu, 506-1205 (Japan)
Publication Date:
OSTI Identifier:
22490648
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1666; Journal Issue: 1; Conference: Neutrino 2014: 26. international conference on neutrino physics and astrophysics, Boston, MA (United States), 2-7 Jun 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; CROSS SECTIONS; GALAXIES; LIMITING VALUES; LORENTZ INVARIANCE; MULTIPARTICLE SPECTROMETERS; NEUTRINO DETECTION; NEUTRINO OSCILLATION; NEUTRINOS; NONLUMINOUS MATTER; PARTICLE IDENTIFICATION; SCATTERING; SUN; WEINBERG ANGLE; YIELDS