Analysing power A_y in the reaction p(pol) p --> p p eta close to threshold

Abstract

Measurements of the eta meson production with a polarised proton beam in the reaction p(pol) p --> p p eta have been carried out at an excess energy of Q = 40 MeV. The dependence of the analysing power A_y on the polar angle theta^*_q of the eta meson in the center of mass system (CMS) has been studied. The data indicate the possibility of an influence of p- and d-waves to the close to threshold eta production.

arXiv comment6 pages, 5 figures, in section 3.1 the formula of vec(p) containing fatal typos was removed, and the values in table were corrected

References in corpus (12)

• Comparison of eta and eta' production in the pp -> pp eta(eta') reactions near threshold
• Near-Threshold eta Meson Production in Proton-Proton Collisions
• Energy Dependence of the Near-Threshold Total Cross-Section for the pp --> pp eta' Reaction
• S-wave eta'-proton FSI; phenomenological analysis of near-threshold production of pi0, eta, and eta' mesons in proton-proton collisions
• Eta Meson Production in NN Collisions
• The production of eta-mesons in nucleon-nucleon collisions near threshold
• Near threshold eta production in proton-proton collisions
• Dependence of pp->pp pi0 near Threshold on the Spin of the Colliding Nucleons
• Higher Partial Waves in p+p->p+p+eta near Threshold
• Measurement of Partial-Wave Contributions in pp --> pp pi^0
• A Covariant OBE Model for $\eta$ Production in NN Collisions
• Monitoring of the accelerator beam distributions for internal target facilities

Cited by in corpus (13)

• Experimental study of pp eta dynamics in the pp --> ppeta reaction
• Production of eta mesons in nucleon-nucleon collisions
• An analysis of the reaction pp --> ppηnear threshold
• Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES
• Spin structure of spin-1/2 baryon and spinless meson production amplitudes in photo and hadronic reactions
• Eta and eta' mesons production at COSY-11
• First close-to-threshold measurement of the analyzing power Ay in the reaction p(pol)p -> pp eta
• Determination of the analysing power for the $\vec{p}p\to pp\eta$ reaction using WASA-at-COSY detector system
• Spin dependence of η meson production in proton-proton collisions close to threshold
• Study of the production mechanism of the eta meson by means of analysing power measurements
• Production of Eta Mesons in Proton-Proton Collisions Close to Threshold
• Eta physics at threshold
• Production and interaction of the eta meson with nucleons and nuclei