Year: 2004
Type: article
Abstract: We use the method of QCD sum rules to investigate a possible hybrid baryon with the quantum numbers of the $\ensuremath{\Lambda}.$ Using a current composed of uds quarks in a color octet and a gluon, a strange hybrid, the ${\ensuremath{\Lambda}}_{H},$ is found about 500 MeV above the $\ensuremath{\Lambda},$ and we identify it as the $\ensuremath{\Lambda}(1600).$ Using our sigma or glueball model we predict a large branching fraction for the ${\ensuremath{\Lambda}}_{H}\ensuremath{\rightarrow}\ensuremath{\Lambda}+\ensuremath{\sigma}(\ensuremath{\pi}\ensuremath{\pi}$ resonance), and the experimental search for this decay mode could provide a test of the hybrid nature of the $\ensuremath{\Lambda}(1600).$
Author: Leonard S. Kisslinger
Institution: Carnegie Mellon University
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W88387120