Narrow Pentaquark States in a Quark Model with Antisymmetrized Molecular Dynamics

Details Narrow Pentaquark States in a Quark Model with Antisymmetrized Molecular Dynamics Narrow Pentaquark States in a Quark Model with Antisymmetrized Molecular Dynamics

2004-10-15

arxiv.org/abs/hep-ph/0410221v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at International Workshop on PENTAQUARK04, Spring-8, Hyogo, Japan, 20-23 Jul 2004

Scientific paper

The exotic baryon $\Theta^+(uudd\bar{s})$ is studied with microscopic calculations in a quark model by using a method of antisymmetrized molecular dynamics(AMD). We predict narrow states, $J^\pi=1/2^+(I=0)$, $J^\pi=3/2^+(I=0)$, and $J^\pi=3/2^-(I=1)$, which nearly degenerate in a low-energy region of the $uudd\bar{s}$ system. We discuss $NK$ decay widths and estimate them to be $\Gamma< 7$ for the $J^\pi=\{1/2^+,3/2^+\}$, and $\Gamma<1$ MeV for the $J^\pi=3/2^-$ state.

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