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

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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.

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Authors and Affiliations

  1. Forschungszentrum Dresden-Rossendorf, PF 510119, 01314, Dresden, Germany

    L. P. Kaptari & B. Kämpfer

  2. TU Dresden, Institut für Theoretische Physik, 01062, Dresden, Germany

    B. Kämpfer

Authors
  1. L. P. Kaptari
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  2. B. Kämpfer
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Xiangdong Ji

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Kaptari, L.P., Kämpfer, B. Di-electrons from η -meson Dalitz decay in proton-proton collisions. Eur. Phys. J. A 33, 157–167 (2007). https://doi.org/10.1140/epja/i2007-10453-y

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