Semi-Contained Neutrino Events in MACRO

TL;DR

This paper reports on low-energy neutrino interactions observed by MACRO, providing evidence consistent with neutrino oscillations and maximal mixing at specific mass-squared differences.

Contribution

It presents updated analyses of neutrino interactions with two different topologies, supporting neutrino oscillation evidence at MACRO.

Findings

Results are inconsistent with no oscillations.

Data supports maximal mixing at Δm² of a few times 10^{-3}.

Analyses of different topologies agree in their implications.

Abstract

Updated results are presented of low-energy ($\bar{E_\nu} \sim 5 GeV$) neutrino interactions observed by the MACRO detector. Two analyses (of different topologies) are presented; individually, and especially in their ratio, they are inconsistent with no oscillations and consistent with maximal mixing at $\Delta m^2$ of a few times $10^{-3}$.