Pentaquark in the Skyrme model

The mass of the newly discovered pentaquark is calculated within the framework of the SU(3) Skyrme Model. Various estimates based on the \emph{model independent} approach are compared with the model results and with the Chiral Quark Model. Our discussion shows that

\Theta^{+}

is light with the mass of the order 1.5 GeV.

Note:

12 pages, 4 figures. In v2 Numerical error in Eq.(19) corrected. The resulting mass of N* is now smaller by 2%. This can be seen in the replaced Fig.1b. Minor typos corrected. All conclusions and discussion remains unchanged. In v3 reference added Report-no: TPJU-5/2003

hadron spectroscopy
baryon resonance: exotic
pentaquark
Theta(1540)
Skyrme model
symmetry: SU(3)
quark: chiral
effective Hamiltonian
group theory: representation
symmetry breaking

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