SN1987A - a Testing Ground for the KARMEN Anomaly

TL;DR

This paper investigates whether SN1987A can test the hypothesis of a new massive neutral fermion suggested by KARMEN data, and finds that most parameter ranges are incompatible with observations, challenging this interpretation.

Contribution

The study demonstrates that SN1987A observations strongly constrain the parameter space of the proposed neutral fermion, providing critical tests for the KARMEN anomaly hypothesis.

Findings

Most proposed particle parameters are ruled out by SN1987A data.

The neutral fermion interpretation of KARMEN data is highly unlikely.

SN1987A serves as an effective astrophysical test for new particle hypotheses.

Abstract

We show, that SN1987A can serve as an astrophysical laboratory for testing the viability of the assertion that a new massive neutral fermion is implied by the KARMEN data. We show that a wide range of the parameters characterizing the proposed particle is ruled out by the above constraints making this interpretation very unlikely.