New Narrow Nucleon N*(1685)

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)

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Cited by in corpus (11)

• On the cross section ratio sigma_n/sigma_p in eta photoproduction
• Evidence for Narrow N*(1685) Resonance in Quasifree Compton Scattering on the Neutron
• Combined study of gamma p to eta p and pi-p to eta n in a chiral constituent quark approach
• Present status on experimental search for pentaquarks
• Evidence for narrow resonant structures at $W\approx 1.68$ and $W\approx 1.72$ GeV in real Compton scattering off the proton
• Is there a narrow $N(1685)$?
• On strange SU(3) partners of Theta+
• Search for narrow resonances in $\pi p$ elastic scattering from the EPECUR experiment
• Mass splittings of the baryon decuplet and antidecuplet with the second-order flavor symmetry breakings within a chiral soliton model
• On Narrow Nucleon Excitation N*(1685)
• New narrow N*(1685) resonance: review of observations