Pentaquark spectrum in string dynamics
classification
✦ hep-ph
keywords
massuuddapproachapproximationdynamicseffectiveevaluatedfound
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The masses of $uudd\bar s $ and $uudd\bar d$ pentaquarks are evaluated in a framework of the Effective Hamiltonian approach to QCD using the Jaffe-Wilczek $[ud]^2\bar q$ approximation. The mass of the $[ud]^2\bar s$ state is found to be $\sim 300-500$ MeV higher than the observed $\Theta^+(1540)$ mass.
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