Open Issues in Neutrino Reactions

TL;DR

This review summarizes current experimental efforts and theoretical considerations in neutrino physics, including cosmic tau-neutrino detection, reactor antineutrino flux anomalies, and Majorana neutrino properties.

Contribution

It highlights unresolved issues and recent experimental results in neutrino reactions, emphasizing the significance of tau-neutrino detection and flux reduction phenomena.

Findings

Detection of cosmic tau-neutrinos demonstrated

Reactor antineutrino flux reduction may be due to short wavelength oscillations

Majorana neutrinos could scatter with a distinctive signature

Abstract

Numerous investigations discuss neutrino properties from low to ultra high energies. This review discusses several topics that are investigated in present day experiments. The first section covers the detection of $\tau$-neutrinos of cosmic origin and describes the significance of the results. The second topic points out that the reported reduction of the antineutrino flux in reactor experiments may be created by short wavelength oscillations where the detector averages over several wavelengths and observes only an average reduction of the antineutrino flux. In many theories the propagating particles are Majoranas and have an anapole moment; they scatter on atomic electrons with a distinct signature in $\bar\nu_e+e^-\rightarrow\bar\nu_e+e^-$ scattering.