Production of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>P</mml:mi><mml:mi>c</mml:mi></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>4312</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> state in electron-proton collisions

Electron Production in Proton Collisions: Total Cross Sections

Charm in Electron–proton Collisions

Charm in electron–proton collisions is a particularly large and interesting field. For this summary two topics particularly relevant for HERA have been selected. First the study of inelastic J/ψ production in both the photoproduction and the electroproduction regime, study still needed to clarify the J/ψ production mechanisms. Second the analysis of D photoproduction events, study than can lead...

φ-meson production in proton-proton collisions

The production of φ-mesons in proton-proton collisions is investigated within a relativistic meson-exchange model of hadronic interactions. The experimental prerequisites for extracting the NNφ coupling strength from this reaction are discussed. In the absence of a sufficient set of data, which would enable an accurate determination of the NNφ coupling strength, we perform a combined analysis, ...

Proton-proton collisions at production thresholds

Recent results obtained by the COSY – 11 collaboration concerning the production of η and η mesons in the pp → ppMeson reaction are presented. A comparison of the production amplitude for the π, η and η mesons at the same phase space volume allows to conclude that the proton η interaction is in the order of, or smaller than, the proton-π one. A total cross section determined in a preliminary an...

Final State Interactions in the Near-Threshold Production of Kaons from Proton-Proton Collisions

We analyse the pp → pΛK cross section recently measured at COSY arguing that the enhancement of the production cross section at energies close to the reaction threshold should be due to the Λp final state interaction. We find that the experimental Λp elastic scattering data as well as the predictions from the Jülich-Bonn model are in reasonable agreement with the new results on K-meson producti...