Extraction of radiative decay width for the non-strange partner of Theta^+

Abstract

Using the results of the GRAAL collaboration on the \eta photoproduction from the neutron target, we attempt to extract the partial radiative width of the possible new nucleon resonance N^*(1675). The obtained estimates support this resonance to be a very attractive candidate for the non-strange member of the exotic antidecuplet of baryons -- a partner of the \Theta^+ pentaquark. Our phenomenological value for the transition magnetic moment \mu(n^* n), appears to be in good agreement with predictions of the Chiral Quark Soliton Model.

Comments: 4 pages, v2 corresponds to the journal publication