$\Lambda N$ correlations from the stopped $K^-$ reaction on ${}^4$He

TL;DR

This study investigates $ ext{Lambda}N$ correlations from stopped $K^-$ reactions on helium-4, revealing two-nucleon absorption processes and potential signals for exotic strange multibaryon states.

Contribution

It provides new experimental evidence of $ ext{Lambda}N$ correlations and identifies non-mesonic channels suggestive of exotic multibaryon formations.

Findings

Observation of $ ext{Lambda}p$ and $ ext{Lambda}n$ branches

Identification of non-mesonic reaction channels

Potential signals for strange multibaryon states

Abstract

We have investigated correlations of coincident $\Lambda N$ pairs from the stopped $K^-$ reaction on ${}^4$He, and clearly observed $\Lambda p$ and $\Lambda n$ branches of the two-nucleon absorption process in the $\Lambda N$ invariant mass spectra. In addition, non-mesonic reaction channels, which indicate possible exotic signals for the formation of strange multibaryon states, have been identified.