# Neutron Disappearance and Regeneration from Mirror State

## TL;DR

This paper proposes a method to detect neutron to mirror neutron oscillations with a beam of cold neutrons, using magnetic field scans to identify potential mirror magnetic fields and resonance conditions.

## Contribution

It introduces a simple experimental approach to observe neutron disappearance and regeneration effects due to mirror states, considering magnetic field influences.

## Key findings

- Potential detection of neutron-mirror neutron oscillations within a ten-second timescale.
- Method to identify mirror magnetic fields by scanning ordinary magnetic fields.
- Framework for future experiments to explore mirror neutron phenomena.

## Abstract

The purpose of this paper is to demonstrate that if the transformation of a neutron to a mirror neutron exists with an oscillation time of the order of ten seconds, it can be detected in a rather simple disappearance and/or regeneration type experiment with an intense beam of cold neutrons. In the presence of a conjectural mirror magnetic field of unknown magnitude and direction, the resonance transformation conditions can be found by scanning the magnitude of the ordinary magnetic field in the range e.g. $\pm 100 \mu$T. Magnetic field is assumed to be uniform along the path of neutron beam. If the transformation effect exists within this range, the direction and possible time variation of the mirror magnetic field can be determined with additional dedicated measurements.