The $Λ$(1600): A Strange Hybrid Baryon

Details The $Λ$(1600): A Strange Hybrid Baryon The $Λ$(1600): A Strange Hybrid Baryon

2003-08-05

arxiv.org/abs/hep-ph/0308059v1

Phys.Rev. D69 (2004) 054015

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revtex file, 3 Figures

Scientific paper

10.1103/PhysRevD.69.054015

We use the method of QCD sum rules to investigate a possible hybrid baryon with the quantum numbers of the $\Lambda$. Using a current composed of uds quarks in a color octet and a gluon, a strange hybrid, the $\Lambda_H$ is found about 500 MeV above the $\Lambda$, and we identify it as the $\Lambda(1600)$. Using our sigma/glueball model we predict a large branching fraction for the $\Lambda_H \to \Lambda + \sigma(\pi\pi$ resonance), and the experimental search for this decay mode could provide a test of the hybrid nature of the $/Lambda(1600)$.

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