New Narrow Nucleon N*(1685)
arXiv:0807.3217 · doi:10.1134/S002136400818001X
Abstract
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.
Typos are corrected. Version published in JETP Letters (Pis'ma v ZhETF)