Observation of Narrow N^+(1685) and N^0(1685) Resonances in γ N →ηπ N Reactions

V. Kuznetsov, F. Mammoliti, F. Tortorici, V. Bellini, V. Brio, A. Gridnev, N. Kozlenko, G. Russo, A. Spatafora, M. L. Sperduto, V. Sumachev, C. Sutera

arxiv（2017）

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摘要

Observation of a narrow structure at W∼ 1.68 GeV in the excitation functions of some photon- and pion-induced reactions may signal a new narrow isospin-1/2 N(1685) resonance. New data on the γ N →πη N reactions from GRAAL seems to reveal the signals of both N^+(1685) and N^0(1685) resonances.

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