Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2008-04-12
Eur.Phys.J.A37:69-80,2008
Physics
Nuclear Physics
Nuclear Theory
Scientific paper
10.1140/epja/i2008-10622-6
The production of $\eta'$ mesons in the reactions $pp\to pp\eta'$ and $pn\to pn\eta' $ at threshold-near energies is analyzed within a covariant effective meson-nucleon theory. The description of cross section and angular distributions of the available data in this kinematical region in the $pp$ channel is accomplished by including meson currents and nucleon currents with the resonances $S_{11}(1650)$, $P_{11}(1710)$ and $P_{13}(1720)$. Predictions for the $pn$ channel are given. The di-electron production from subsequent $\eta'$ Dalitz decay $\eta' \to \gamma \gamma^* \to\gamma e^+e^-$ is also calculated and numerical results are presented for intermediate energy and kinematics of possible experiments with HADES, CLAS and KEK-PS.
Kampfer Burkhard
Kaptari Leonid P.
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