Second Class Currents, Axial Mass and Nuclear Effects in Hyperon Production

TL;DR

This paper investigates hyperon production in antineutrino-nucleus interactions, focusing on the effects of axial mass modifications, second class currents, and nuclear interactions, providing predictions for experimental observations.

Contribution

It introduces a comprehensive model including nuclear effects, second class currents, and SU(3) violations to predict hyperon production in antineutrino interactions.

Findings

Significant enhancement of $ ext{Lambda}$ production due to nuclear effects.

Hyperon potential influences production through absorption.

Predictions tailored for various experimental setups.

Abstract

We study the properties of the Cabibbo suppressed quasielastic production of $\Lambda$ and $\Sigma$ hyperons in antineutrino interactions with nuclei, including the effects of modified form factor axial mass, the second class current and SU(3) flavour violations. The hyperon and nucleon are subjected to the nuclear potential and the outgoing hyperon can undergo final state interactions. The hyperon potential has a significant effect on their production through absorption. We predict a significant enhancement of $\Lambda$ production compared with other hyperon production channels through $\Sigma \to \Lambda$ conversions. We produce predictions for several experiments by combining realistic neutrino energy distributions with suitable nuclear targets.