Investigation of the anomaly in η-photoproduction off the neutron

摘要：

Quasi-free photoproduction of η-mesons off the neutron and off the proton has been studied using a deuterium target and bremsstrahlung photons produced by MAMI-C with incident energies up to 1.5 GeV. The η-mesons were detected in coincidence with the recoil nucleons thus a fully exclusive measurement was performed. Preliminary results show a bump-like structure in the excitation function for the neutron close to W ≈ 1675 MeV which is not seen for the proton. Considering the experimental resolution and using a Breit-Wigner fit the width of this structure was approximated below 50 MeV.

关键词： photoproduction eta-meson narrow nucleon resonance

作者: D.Werthmüller

作者单位: Department of Physics,University of Basel,Klingelbergstrasse 82,CH-4056 Basel,Switzerland

会议类型: 国际会议

会议名称: The 12th International Workshop on the Physics of Ezcited Nucleon NSTAR2009(2009激发态核子物理研讨会)

会议地点: 北京

会议语种:英文

页码: 1345-1348

在线出版日期: 2009-04-19（万方平台首次上网日期，不代表论文的发表时间）