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Title: The narrow pentaquark

Abstract

The experimental status of the pentaquark searches is briefly reviewed. Recent null results by the CLAS collaboration are commented, and new strong evidence of a very narrow {theta}+ resonance by the DIANA collaboration is presented. On the theory side, I revisit the argument against the existence of the pentaquark - that of Callan and Klebanov - and show that actually a strong resonance is predicted in that approach, however its width is grossly overestimated. A recent calculation gives 2 MeV for the pentaquark width, and this number is probably still an upper bound.

Authors:
 [1]
  1. Petersburg Nuclear Physics Institute, Gatchina, 188 300, St. Petersburg (Russian Federation)
Publication Date:
OSTI Identifier:
21056825
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 892; Journal Issue: 1; Conference: QCHS7: 7. conference on quark confinement and the hadron spectrum, Ponta Delgada, Acores (Portugal), 2-7 Sep 2006; Other Information: DOI: 10.1063/1.2714388; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BARYONS; MEV RANGE; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PARTICLE WIDTHS; QUARK MODEL; RESONANCE PARTICLES

Citation Formats

Diakonov, Dmitri. The narrow pentaquark. United States: N. p., 2007. Web. doi:10.1063/1.2714388.
Diakonov, Dmitri. The narrow pentaquark. United States. doi:10.1063/1.2714388.
Diakonov, Dmitri. Tue . "The narrow pentaquark". United States. doi:10.1063/1.2714388.
@article{osti_21056825,
title = {The narrow pentaquark},
author = {Diakonov, Dmitri},
abstractNote = {The experimental status of the pentaquark searches is briefly reviewed. Recent null results by the CLAS collaboration are commented, and new strong evidence of a very narrow {theta}+ resonance by the DIANA collaboration is presented. On the theory side, I revisit the argument against the existence of the pentaquark - that of Callan and Klebanov - and show that actually a strong resonance is predicted in that approach, however its width is grossly overestimated. A recent calculation gives 2 MeV for the pentaquark width, and this number is probably still an upper bound.},
doi = {10.1063/1.2714388},
journal = {AIP Conference Proceedings},
number = 1,
volume = 892,
place = {United States},
year = {Tue Feb 27 00:00:00 EST 2007},
month = {Tue Feb 27 00:00:00 EST 2007}
}