We study pentaquark states of both light q4qˉ and hidden heavy q3QQˉ (q = u,d,s quark in SU(3) flavor symmetry; Q = c, b quark) systems with a general group theory approach in the constituent quark model, and the spectrum of light baryon resonances in the ansatz that the l=1 baryon states may consist of the q3 as well as q4qˉ pentaquark component. The model is fitted to ground state baryons and light baryon resonances which are believed to be normal three-quark states. The work reveals that the N(1535)1/2− and N(1520)3/2− may consist of a large q4qˉ component while the N(1895)1/2− and N(1875)3/2− are respectively their partners, and the N+(1685) might be a q4qˉ state. By the way, a new set of color-spin-flavor-spatial wave function for q3QQˉ systems in the compact pentaquark picture are constructed systematically for studying hidden charm pentaquark states.
@article{arxiv.2002.04230,
title = {Pentaquark components in low-lying baryon resonances},
author = {Kai Xu and Attaphon Kaewsnod and Zheng Zhao and Xuyang Liu and Sorakrai Srisuphaphon and Ayut Limphirat and Yupeng Yan},
journal= {arXiv preprint arXiv:2002.04230},
year = {2020}
}