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Pentaquarks in the Jaffe-Wilczek approximation

I. M. Narodetskii·C. Semay·B. Silvestre-Brac·Yu. A. Simonov·M. A. Trusov
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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.

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I. M. Narodetskii, C. Semay, B. Silvestre-Brac, Yu. A. Simonov, M. A. Trusov. 2005-11-13. Pentaquarks in the Jaffe-Wilczek approximation. https://doi.org/10.1134/1.1891207

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