In a recent experiment E906 at the BNL-AGS, a search for light S=-2 hypernuclei, strong evidence was found for the nuclide Hydrogen-4 double Lambda. One of the most striking components of this data was the appearance of a narrow low-momentum pi- line at k(pi-) = 104-105 MeV/c. This was ascribed to the decay of Hydrogen-4 double Lambda into a resonant state in Helium-4 Lambda. The existence of such a state is shown to be plausible and its characteristics are delineated.
@article{arxiv.nucl-th/0303013,
title = {Resonant State in Helium-4 Lambda},
author = {D. E. Kahana and S. H. Kahana and D. J. Millener},
journal= {arXiv preprint arXiv:nucl-th/0303013},
year = {2009}
}