Phenomenology of pp->pp eta reaction close to threshold

Abstract

The recent high statistics measurement of the pp -> pp eta reaction at an excess energy Q=15.5 MeV has been analysed by means of partial wave decomposition of the cross section. Guided by the dominance of the final state 1S0 pp interaction (FSI), we keep only terms involving the FSI enhancement factor. The measured p-p and p-eta effective mass spectra can be well reproduced by lifting the standard on-shell approximation in the enhancement factor and by allowing for a linear energy dependence in the leading 3P0->1S0,s partial wave amplitude. Higher partial waves seem to play only a marginal role.

References in corpus (3)

• N-d scattering including electromagnetic forces
• An analysis of the reaction pp --> ppηnear threshold
• Production of eta mesons in nucleon-nucleon collisions

Cited by in corpus (21)

• Sommerfeld factor for arbitrary partial wave processes
• Meson production in nucleon--nucleon collisions close to the threshold
• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Combined analysis of eta' production reactions: gamma N -> eta' N, N N -> N N eta', and pi N -> eta' N
• Interaction of eta mesons with nuclei
• Eta meson production in nucleon-nucleon collisions within an effective Lagrangian model
• Hyperon production in near threshold nucleon-nucleon collisions
• Measurement of the invariant mass distributions for the pp -> ppeta' reaction at excess energy of Q = 16.4 MeV
• Invariant mass distributions for the pp to p p eta reaction at Q=10 MeV
• Few-body aspects of the near threshold pseudoscalar meson production
• The pp -> pp pi pi pi reaction channels in the threshold region
• Study of the eta meson production with the polarised proton beam
• Eta and eta' mesons production at COSY-11
• Near-threshold $\eta$ production in $pp$ collisions
• Hadronic interaction of the eta meson with two nucleons
• The detailed mechanism of the eta production in pp scattering up to the Tlab = 4.5 GeV
• Spin dependence of η meson production in proton-proton collisions close to threshold
• Hadronic production of eta--mesons: recent results and open questions
• Studies of properties of the eta' meson at the COSY-11 facility
• Production of Eta Mesons in Proton-Proton Collisions Close to Threshold
• Leading Modes of the 3pi0 production in proton-proton collisions at incident proton momentum 3.35GeV/c