Atmospheric results from Super-Kamiokande

Abstract

Abstract. 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 evidence of oscillations into a sterile neutrino have resulted in limits on the parameters governing their mixing, |U μ4 | 2 < 0.041 and |U τ4 | 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.

Measurement of atmospheric tau neutrino appearance with IceCube DeepCore

“…V E. Figure 13 shows the 90% allowed region of atmospheric neutrino oscillation parameters for the analyses based on analysis A and IC2017, and the allowed regions reported by other experiments. Overall, the 90% allowed regions from analysis A and IC2017 are statistically consistent, and both results compare favorably with the latest published 90% contours from other neutrino experiments [64][65][66][67].…”

“…The 90% allowed region using the data sample from analysis A in blue compared to other experiments[19,[64][65][66][67]. The best fit point from analysis A is shown as the blue cross mark.…”

The contribution of light Majorana neutrinos to neutrinoless double beta decay and cosmology

“…This conclusion relies on partially contradictory information. In fact, the analysis of atmospheric neutrinos performed by the Super-Kamiokande Collaboration [6] shows a "tendency" (i. e. a 1σ preference) in favor of the N H.…”

Probing particle physics with IceCube

“…[75], where the energy of the neutrinos is obtained by using contained events in DeepCore and the assumption that the resulting muon is minimum ionising. Once the vertex of the neutrino interaction and the muon decay point have been identified, the energy of the muon plane compared with results of Super-Kamiokande [70], T2K [71], MINOS [72] and NOvA [73]. A normal mass ordering is assumed.…”