By assuming a mass formula for the spectrum of the Y=2 pentaquarks, where the chromo-magnetic interaction plays a main role, and identifying the lightest state with the Theta^+(1540), we predict a spectrum in good agreement with the few I=0 and I=1 candidates proposed in the past.
@article{arxiv.hep-ph/0503230,
title = {Spectrum of the Y=2 Pentaquarks},
author = {F. Buccella and D. Falcone and F. Tramontano},
journal= {arXiv preprint arXiv:hep-ph/0503230},
year = {2009}
}