# Decay pion spectroscopy: a new approach

## TL;DR

This paper introduces a novel decay pion spectroscopy method for light hypernuclei using recoil distance and magnetic spectrometry, promising significant improvements in detection rates at electron and proton beam facilities.

## Contribution

It proposes a new experimental approach combining recoil distance technique and magnetic spectrometry for enhanced decay pion spectroscopy of hypernuclei.

## Key findings

- Recoil detector characteristics were studied with alpha particles.
- The method can increase hypernuclei detection rates by 10 to 100 times.
- Potential for high luminosity experiments with proton beams is discussed.

## Abstract

We propose a new experiment for decay pion spectroscopy of light hypernuclei at electron- and proton-beam facilities, using the recoil distance technique for separation of produced hypernuclei and a magnetic spectrometer for precise measurement of the decay pion momentum. Low-pressure MWPCs are advocated for low-energy recoil detection as they provide position and time information and are highly insensitive to gamma-ray and electron background. The position and timing characteristics of such a recoil detector were studied using ~5 MeV {\alpha}-particles. By using the present proposed approach the rate of the detected hypernuclei can be increased by one-to-two orders of magnitude compared to a recent experiment carried out at the MAMI electron accelerator in Mainz. The possibility of realizing a high luminosity decay pion spectroscopy experiment with proton beams is also discussed.

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Source: https://tomesphere.com/paper/1902.03075