Pentaquarks in string dynamics

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 masses of the light pentaquarks are found to be in the region above 2 GeV. The similar calculations yield the mass of $[ud{]}^2\bar{c}$ pentaquark $\sim$ 3250 MeV and $[ud{]}^2\bar{b}$ pentaquark $\sim$ 6509 MeV.

Comments: 5 pages. Based on talk by I.M.Narodetskii at BEACH 2004, 6th International Conference on Hyperons, Charm and Beauty Hadrons, Illionois Institute of Technology, Chicago, June. 27 - July 3, 2004. Typos corrected