New Narrow N(1685) and N(1726)? Remarks on the Interpretation of the Neutron Anomaly as an Interference Phenomenon
V. Kuznetsov+*, V. Bellini*×, V. Brio*×, A.Gridnev+, N.Kozlenko+, F.Mammoliti*×, F.Tortorici*×, M.V.Polyakov+°, G.Russo*×, M.L.Sperduto*×, V.Sumachev+, C.M.Sutera*
+Petersburg Nuclear Physics Institute, 188300 Gatchina, Russia
*INFN - Sezione di Catania, via Santa Sofia 64, I-95123 Catania, Italy
×Dipartimento di Fisica ed Astronomia, Universitàdi Catania, via Santa Sofia 64, I-95123 Catania, Italy
°Institute für Theoretische Physik II, Ruhr-Universität Bochum, D - 44780 Bochum, Germany
Abstract
Different interpretations of narrow structures at
and GeV observed in several reactions are
discussed. It is questionable whether interference phenomena could
explain the whole complex of experimental findings.
More probable hypotheses would be the existence of one or two narrow
resonances
N(1685) and N(1726) and/or the sub-threshold virtual KΣ and
ω p production (cusps).