New Narrow Nucleon N*(1685)
V. Kuznetsov+*, M. V. Polyakov
+ Kyungpook National University, 702-701, Daegu, Republic of Korea *Institute for Nuclear Research, 117312, Moscow, Russia ∇Institute für Theoretische Physik II, Ruhr-Universität Bochum, D - 44780 Bochum, Germany, Petersburg Nuclear Physics Institute, 188300 Gatchina, St. Petersburg, Russia
PACS: 13.60.Le, 14.20.Gk
Abstract
We argue that the existence of a new narrow
(MeV) nucleon resonance N*(1685) is strongly supported
by recent data on η 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 Θ+. All known to the date
properties of new N*(1685) are summarized.
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