Investigation of the anomaly in eta-photoproduction off the neutron
arXiv:1001.3840 · doi:10.1088/1674-1137/33/12/051
Abstract
Quasi-free photoproduction of eta-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 eta-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.
arXiv commentoral contribution to the workshop on physics of the excited nucleon - NSTAR 2009, Beijing, April 2009
References in corpus (13)
- Study of Non-Strange Baryon Resonances with Meson Photoproduction
- Photoproduction of eta-mesic 3He
- Photoproduction of eta mesons off protons for photon energies from 0.75 GeV to 3 GeV
- Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C
- Evidence for a narrow structure at W~1.68 GeV in eta photoproduction on the neutron
- The e p -> e' p eta reaction at and above the S11(1535) baryon resonance
- Nonstrange and other unitarity partners of the exotic Theta+ baryon
- Differential cross section measurement of eta photoproduction on the proton from threshold to 1100 MeV
- Q^2 Dependence of the S_{11}(1535) Photocoupling and Evidence for a P-wave resonance in eta electroproduction
- Measurement of the beam asymmetry in eta-photoproduction off the proton
- Quasi-free photoproduction of eta-mesons of the neutron
- Electroproduction of the S11(1535) Resonance at High Momentum Transfer
- Exclusive measurement of coherent eta photoproduction from the deuteron