P-wave pentaquarks with strangeness +1, I=0 and J^P=1/2^+ are studied in the non-relativistic quark model with instanton induced interaction (III). We present their mass splittings and orbital-spin-isospin-color structures. It is found that decompositions of the wave functions are sensitive to III, while the mass splittings are insensitive. The decay of the lowest energy pentaquark, \Theta^+, is found to be suppressed when the contribution of III is increased. Its wave function is dominated by Jaffe-Wilczek-type configuration at large III.
@article{arxiv.hep-ph/0510001,
title = {P-wave Pentaquark and its Decay in the Quark Model with Instanton Induced Interaction},
author = {Tetsuya Shinozaki and Makoto Oka and Sachiko Takeuchi},
journal= {arXiv preprint arXiv:hep-ph/0510001},
year = {2008}
}