An analysis of the reaction pp --> ppηnear threshold

Abstract

It is shown that most of the available data on the $pp\to pp\eta$ reaction, including the invariant mass distributions in the $pp\to pp\eta$ reaction recently measured at COSY, can be understood in terms of the partial-wave amplitudes involving final $pp$ $S$ and $P$ states and the $\eta$ meson s-wave. This finding, together with the fact that results within a meson--exchange model are especially sensitive to the details of the excitation mechanism of the $S_{11}(1535)$ resonance, demonstrates the possibility of investigating the properties of this resonance in $NN$ collisions. The spin correlation function $C_{xx}$ is shown to disentangle the $S$- and $P$-wave contributions. It is also argued that spin correlations may be used to help constrain the contributions of the amplitudes corresponding to the final $pp$ ${}^3{P}_0$

arXiv comment10 pages, 7 figures, minor revision with one additional figure

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Cited by in corpus (28)

• Meson production in nucleon--nucleon collisions close to the threshold
• Near threshold enhancement of the ppbar mass spectrum in J/Psi decay
• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Determination of the eta'-proton scattering length in free space
• Combined analysis of eta' production reactions: gamma N -> eta' N, N N -> N N eta', and pi N -> eta' N
• How to extract the $\Lambda N$ scattering length from production reactions
• Interaction of eta mesons with nuclei
• The role of $N^{\ast }(1535)$ in ${\eta }^{\prime }$ production
• Phenomenology of pp->pp eta reaction close to threshold
• Consistent analysis of the reaction $\gamma p\to p{\eta }^{\prime }$ and $pp\to pp{\eta }^{\prime }$
• Eta meson production in nucleon-nucleon collisions within an effective Lagrangian model
• Measurement of the invariant mass distributions for the pp -> ppeta' reaction at excess energy of Q = 16.4 MeV
• Mesonic Content of the Nucleon and the Roper Resonance
• Final state interaction in the reaction NN -> eta NN
• 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
• Spin structure of spin-1/2 baryon and spinless meson production amplitudes in photo and hadronic reactions
• 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
• 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
• Studies of properties of the eta' meson at the COSY-11 facility
• Production of Eta Mesons in Proton-Proton Collisions Close to Threshold
• Production and interaction of the eta meson with nucleons and nuclei