Ilya Narodetskii
ITEP, Moscow, Russia
Pentaquarks in the Jaffe-Wilczek approximation
The masses of uuddc,
uuddd and
uussd 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]2c
pentaquark ∼ 3250 MeV and [ud]2b
pentaquark ∼ 6510 MeV.
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