We argue that the existence of a new narrow (Gamma < 25 MeV) nucleon resonance N*(1685) is strongly supported by recent data on eta photoproduction off the nucleon. The resonance has much stronger photo-coupling to the neutron than to the proton. This nucleon resonance is a good candidate for the non-strange member of the exotic anti-decouplet of baryons -- the partner of the pentaquark Theta+. All up to date known properties of new N*(1685) are summarized.
@article{arxiv.0807.3217,
title = {New Narrow Nucleon N*(1685)},
author = {V. Kuznetsov and M. V. Polyakov},
journal= {arXiv preprint arXiv:0807.3217},
year = {2008}
}
Comments
Typos are corrected. Version published in JETP Letters (Pis'ma v ZhETF)