Role of Large Gluonic Excitation Energy for Narrow Width of Penta-Quark Baryons in QCD String Theory

Abstract

We study the narrow decay width of low-lying penta-quark baryons in the QCD string theoryin terms of gluonic excitations. In the QCD string theory, the penta-quark baryon decays via a gluonic-excited state of a baryon and meson system, where a pair of Y-shaped junction and anti-junction is created. Since lattice QCD shows that the lowest gluonic-excitation energy takes a large value of about 1 GeV, the decay of the penta-quark baryon near the threshold is considered as a quantum tunneling process via a highly-excited state (a gluonic-excited state) in the QCD string theory. This mechanism strongly suppresses the decay and leads to an extremely narrow decay width of the penta-quark system.

Talk given at International Conference on the Structure of Baryons (Baryons 04) October 25 - 29, 2004, Ecole Polytechnique, Palaiseau, France

References in corpus (5)

• Pentaquarks
• Detailed analysis of the gluonic excitation in the three-quark system in lattice QCD
• Chromo-Electric flux tubes
• Pentaquark Baryons in String Theory
• Y-type Flux-Tube Formation and Gluonic Excitations in Baryons: From QCD to Quark Model

Cited by in corpus (8)

• New Charmonium States in QCD Sum Rules: a Concise Review
• Detailed Analysis of the Tetraquark Potential and Flip-Flop in SU(3) Lattice QCD
• Pentaquark Decay Width in QCD Sum Rules
• Scalar and Vector 4Q Systems in Anisotropic Lattice QCD
• Lowest-lying Tetra-Quark Hadrons in Anisotropic Lattice QCD
• Universal Short-Range Repulsion in the Baryon System Originating from the Confinement --Approach in String-Junction Model--
• Tetraquark and Pentaquark Systems in Lattice QCD
• f(2010) in Lattice QCD