Pentaquark spectroscopy: exotic {theta} baryons

Journal Article · Mon Sep 13 00:00:00 EDT 2004 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1805936· OSTI ID:20632795

Bijker, R ^[1]; Giannini, M M; Santopinto, E ^[2]

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1. Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, A.P. 70-543, 04510 Mexico, D.F. (Mexico)
2. Dipartimento di Fisica dell'Universita di Genova, I.N.F.N., Sezione di Genova, via Dodecaneso 33, 16164 Genova (Italy)

We propose a collective stringlike model of q4q-bar pentaquarks with the geometry of an equilateral tetrahedron in which the four quarks are located at the four corners and the antiquark in its center. The nonplanar equilibrium configuration is a consequence of the permutation symmetry of the four quarks. In an application to the spectrum of exotic {theta} baryons, we find that the ground state pentaquark has angular momentum and parity Jp 1/2- and a small magnetic moment of 0.382 {mu}N. The decay width is suppressed by the spatial overlap with the decay products.

• OSTI ID: 20632795
• Journal Information: AIP Conference Proceedings, Vol. 726, Issue 1; Conference: International conference on microscopic studies of collective phenomena, Morelos (Mexico), 19-22 Apr 2004; Other Information: DOI: 10.1063/1.1805936; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BARYON SPECTROSCOPY
BARYONS
GROUND STATES
MAGNETIC MOMENTS
PARITY
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE WIDTHS
QUARK-ANTIQUARK INTERACTIONS
QUARK-QUARK INTERACTIONS
QUARKS
REGGE TRAJECTORIES
RESONANCE PARTICLES
STRING MODELS