Pentaquarks in the Jaffe-Wilczek approximation

Abstract

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.

14 pages, 2 tables, LaTeX2e. References corrected

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Cited by in corpus (1)

• Three-body model for $K(1460)$ resonance