Production of $\omega$-mesons in proton-proton collisions

Abstract

The production of $\omega$-mesons in proton-proton collisions for proton incident energies up to 2.2 GeV is investigated within a meson-exchange model of hadronic interactions. We find a large cancellation between the dominant $\pi \rho \omega$ meson-exchange current and nucleonic current contributions. A comparison with preliminary data from SATURNE calls for the inclusion of off-shell form factors at the $NN\omega$ and $\pi \rho \omega$ production vertices. Due to the present lack of knowledge of these form factors, together with the destructive interference mentioned above, the relative magnitude of the nucleonic and meson-exchange current contributions cannot be determined from existing total cross section data. However, it is shown that the angular distribution of the produced $\omega$-mesons provides an unique and clear signature of the magnitude of these currents, thus allowing one to disentangle these two basic reaction mechanisms.

arXiv comment17 pages, 7 figures

References in corpus (8)

• Dispersion-Theoretical Analysis of the Nucleon Electromagnetic Formfactors
• Photoproduction of vector mesons off nucleons near threshold
• Phi Meson Production in Heavy-Ion Collisions at SIS Energies
• $\pi NN$ and Pseudoscalar Form Factors from Lattice QCD
• Heavy Meson Production in Proton-Nucleus Reactions with Empirical Spectral Functions
• Near threshold eta production in proton-proton collisions
• Phi meson production cross sections in pion-baryon and baryon-baryon interactions
• The influence of negative-energy states on proton-proton bremsstrahlung

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