Interference phenomena in the J^P = 1/2⁻ wave in η photoproduction

TY - JOUR

T1 - Interference phenomena in the JP = 1/2− wave in η photoproduction

AU - Anisovich, A. V.

AU - Klempt, E.

AU - Krusche, B.

AU - Nikonov, V. A.

AU - Sarantsev, A. V.

AU - Thoma, U.

AU - Werthmüller, D.

PY - 2015/6/30

Y1 - 2015/6/30

N2 - The recent precise experimental results for the photoproduction of η-mesons off the neutron measured with the Crystal Ball/TAPS calorimeter at the MAMI accelerator have been investigated in detail in the framework of the Bonn-Gatchina coupled-channel model. The main result is that the narrow structure observed in the excitation function of γη → nη can be reproduced fully with a particular interference pattern in the JP = 1/2− partial wave. Introduction of the narrow resonance N(1685) with the properties reported in earlier publications deteriorates the quality of the fit.

AB - The recent precise experimental results for the photoproduction of η-mesons off the neutron measured with the Crystal Ball/TAPS calorimeter at the MAMI accelerator have been investigated in detail in the framework of the Bonn-Gatchina coupled-channel model. The main result is that the narrow structure observed in the excitation function of γη → nη can be reproduced fully with a particular interference pattern in the JP = 1/2− partial wave. Introduction of the narrow resonance N(1685) with the properties reported in earlier publications deteriorates the quality of the fit.

UR - http://www.scopus.com/inward/record.url?scp=84933054089&partnerID=8YFLogxK

U2 - 10.1140/epja/i2015-15072-5

DO - 10.1140/epja/i2015-15072-5

M3 - Article

SN - 1434-6001

VL - 51

JO - European Physical Journal A

JF - European Physical Journal A

IS - 6

M1 - 72

ER -