Pentaquarks in the Jaffe-Wilczek approximation

Details Pentaquarks in the Jaffe-Wilczek approximation Pentaquarks in the Jaffe-Wilczek approximation

2005-10-30

arxiv.org/abs/hep-ph/0510401v2

Phys.Atom.Nucl. 68 (2005) 536-540; Yad.Fiz. 68 (2005) 564-568

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 2 tables, LaTeX2e. References corrected

Scientific paper

10.1134/1.1891207

The masses of $uudd\bar s $, $uudd\bar d$ and $uuss\bar d$ pentaquarks are evaluated in a framework of both the Effective Hamiltonian approach to QCD and spinless Salpeter using the Jaffe--Wilczek diquark approximation and the string interaction for the diquark--diquark--antiquark system. The pentaquark masses are found to be in the region above 2 GeV. That indicates that the Goldstone boson exchange effects may play an important role in the light pentaquarks. The same calculations yield the mass of $[ud]^2\bar c$ pentaquark $\sim$ 3250 MeV and $[ud]^2\bar b$ pentaquark $\sim$ 6509 MeV.

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