Decay of the $\Lambda(1405)$ Hyperon to $\Sigma^0\pi^0$ Measured at GlueX
Abstract
Among the light baryons, the hyperon is an important special case as it sits just below the threshold and decays almost exclusively to . Some long-standing hypotheses for are that it could be a bound state or a continuum resonance. It may also be considered as a simple quark-model resonance, the -wave companion of the . In recent years chiral unitary models have suggested that there are two isospin zero poles present in this mass region, and that the "line shape" of the depends to what extent each of the two poles are stimulated in a given reaction. Below the threshold, the decays to the three charge combinations. The mode is purely and it is uncontaminated by complications arising from scattering processes contributing to the reaction mechanism in the and decays. It is also not affected from production and decay of the nearby hyperon. The GlueX experiment at Jefferson Lab has been used to study the decay mode. We focus on the preliminary results of and fits to the line shape of the region in the range 0 - 1.5 GeV from analyzing the reaction using the data collected during the first phase of the GlueX program.
Cite
@article{arxiv.2209.06230,
title = {Decay of the $\Lambda(1405)$ Hyperon to $\Sigma^0\pi^0$ Measured at GlueX},
author = {Nilanga Wickramaarachchi and Reinhard A. Schumacher and Grzegorz Kalicy},
journal= {arXiv preprint arXiv:2209.06230},
year = {2022}
}
Comments
6 pages, 4 figures, Proceedings of the 14th International Conference on Hypernuclear and Strange Particle Physics (HYP2022), 27 June to 1 July 2022