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The European Physical Journal A

, Volume 33, Issue 2, pp 157–167 | Cite as

Di-electrons from η -meson Dalitz decay in proton-proton collisions

  • L. P. Kaptari
  • B. Kämpfer
Regular Article - Experimental Physics

Abstract.

The reaction \(\ensuremath pp\rightarrow pp\eta\rightarrow pp\gamma e^+e^-\) is discussed within a covariant effective meson-nucleon theory. The model is adjusted to data of the subreaction \(\ensuremath pp \rightarrow pp\eta\) . Our focus is on di-electrons from Dalitz decays of η -mesons, \(\ensuremath \eta\rightarrow\gamma\gamma^* \rightarrow\gamma e^+e^-\) , and the role of the corresponding transition form factor \(\ensuremath F_{\eta\gamma\gamma^*}\) . Numerical results are presented for the intermediate-energy kinematics of HADES experiments.

PACS.

13.60.Le Meson production 13.75.-n Hadron-induced low- and intermediate-energy reactions and scattering (energy ⩽ 10 GeV) 13.85.Lg Total cross sections 25.40.-h Nucleon-induced reactions 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • L. P. Kaptari
    • 1
  • B. Kämpfer
    • 1
    • 2
  1. 1.Forschungszentrum Dresden-RossendorfDresdenGermany
  2. 2.TU DresdenInstitut für Theoretische PhysikDresdenGermany

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