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The European Physical Journal A

, Volume 46, Issue 3, pp 359–371 | Cite as

Analysis of recent \( \eta\) photoproduction data

  • A. Sibirtsev
  • J. HaidenbauerEmail author
  • S. Krewald
  • U. -G. Meißner
Regular Article - Theoretical Physics

Abstract.

Recent data on \( \eta\) -meson photoproduction off a proton target in the energy range 2\( \le\) \( \sqrt{{s}}\) \( \le\)3 GeV are analyzed with regard to their overall consistency. Results from the ELSA and CLAS measurements are compared with predictions of a Regge model whose reaction amplitude was fixed via a global fit to pre-2000 measurements of differential cross sections and polarization observables for \( \gamma\) p \( \rightarrow\) \( \eta\) p at higher energies. We find that all recent experimental results on differential cross sections for \( \eta\) -meson photoproduction are in good agreement with each other, except for the CLAS data from 2009. However, the latter can be made consistent with the other data at the expense of introducing an energy-dependent renormalization factor. We point out that there are indications in the data for a possible excitation of baryon resonances with masses around 2.1 and 2.4GeV.

Keywords

Photon Energy Regge Model Helicity Amplitude Renormalization Factor Baryon Resonance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • A. Sibirtsev
    • 1
    • 2
    • 3
    • 4
  • J. Haidenbauer
    • 3
    • 5
    Email author
  • S. Krewald
    • 3
    • 5
  • U. -G. Meißner
    • 1
    • 3
    • 5
  1. 1.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical PhysicsUniversität BonnBonnGermany
  2. 2.Excited Baryon Analysis Center (EBAC)Thomas Jefferson National Accelerator FacilityNewport NewsUSA
  3. 3.Institut für Kernphysik and Jülich Center for Hadron PhysicsForschungszentrum JülichJülichGermany
  4. 4.Institute of High Energy Physics and Center for Theoretical StudiesChinese Academy of SciencesBeijingChina
  5. 5.Institute for Advanced SimulationForschungszentrum JülichJülichGermany

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