Search for \eta -Mesic Nuclei at J-PARC

TL;DR

This paper discusses the potential of using (, N) reactions at J-PARC to search for -mesic nuclei, comparing with past experiments and emphasizing the need for pilot studies with deuterium targets to understand background signals.

Contribution

It introduces a new approach for -mesic nuclei search at J-PARC and highlights the importance of pilot experiments with deuterium targets for background analysis.

Findings

Comparison with BNL experiment underscores the potential of (, N) reactions at J-PARC.

Pilot experiments with deuterium targets are crucial for background understanding.

The proposed method could improve detection of -mesic nuclei.

Abstract

The merits of searching for \eta -mesic nuclei by use of the (\pi, N) reaction at J-PARC is discussed, by comparison with an old experiment with the same reaction at BNL in 1980's. The importance of a pilot experiment using deuterium target is also stressed for a better understanding of the background which should exist even after the coincidence of the decay particles of \eta -mesic nuclei.