The Reaction $pp\to pp\eta$ and the eta-Nucleon and Nucleon-Nucleon Interactions

Abstract

The $\pi$, $\eta$ and $\rho$ exchange contributions to the cross-section for the reaction $pp\to pp\eta$ near threshold are calculated with a phenomenological description of the intermediate S11 (N(1535)) resonance for all exchange mechanisms. The final state interaction in the $pp$ system is described by realistic nucleon-nucleon interaction models. The sensitivity of the results to the phenomenological models for the $\eta$-nucleon transition amplitude and the nucleon-nucleon interaction is explored. The $\eta$ exchange mechanism is found to play a dominant role. The off-shell behavior of the $\eta N\to \eta N$ amplitude within the $\eta -$exchange amplitude leads to a result significantly different from that obtained with the constant scattering length approximation. The two-nucleon amplitudes that are associated with the short range components of the nucleon-nucleon interaction contribute significantly to the cross section.

RevteX 22 p., 6 figures

References in corpus (3)

• The $\eta NN$ coupling constant
• eta d scattering in the region of the S11 resonance
• Meson-baryon couplings and the $F/D$ ratio from QCD sum rules

Cited by in corpus (19)

• Comment on "Mass and K Lambda coupling of N*(1535)"
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• Close-to-threshold Meson Production in Hadronic Interactions
• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Experimental study of pp eta dynamics in the pp --> ppeta reaction
• Eta Meson Production in NN Collisions
• The production of eta-mesons in nucleon-nucleon collisions near threshold
• Study of π^{-}p \to ηn at low energies in a chiral constituent quark model
• Production of eta mesons in nucleon-nucleon collisions
• The role of $N^{\ast }(1535)$ in ${\eta }^{\prime }$ production
• Phenomenology of pp->pp eta reaction close to threshold
• Associated strangeness production in the pp to pK^+K^-p and pp to pK^+ pi^0 Sigma^0 reactions
• Analysis of Dilepton Invariant Mass Spectrum in C+C at 2 and 1 AGeV
• Final state interactions in the eta-d system
• Final state interaction in the reaction NN -> eta NN
• The Coupling of eta Mesons to Quarks and Baryons from D_s^* -> D_s pi^0 Decay
• Incoherent Photoproduction of $\eta$-mesons from the Deuteron near Threshold
• Near-threshold $\eta$ production in $pp$ collisions
• Spin dependence of η meson production in proton-proton collisions close to threshold