• Medientyp: E-Artikel
  • Titel: Analysis of the reaction pp to pp eta near threshold
  • Beteiligte: Nakayama, K. [Verfasser:in]; Haidenbauer, J. [Verfasser:in]; Hanhart, C. [Verfasser:in]; Speth, J. [Verfasser:in]
  • Erschienen: Inst., 2003
  • Erschienen in: Physical review / C 68, 045201 (2003). doi:10.1103/PhysRevC.68.045201
  • Sprache: Englisch
  • DOI: https://doi.org/10.1103/PhysRevC.68.045201
  • ISSN: 0556-2813
  • Schlagwörter: mass spectrum: (p eta) ; numerical calculations ; mass spectrum: (2p) ; partial wave analysis ; eta: angular distribution ; polarization ; threshold ; p p: inelastic scattering ; interpretation of experiments: Juelich COSY PS ; N(1535) ; p: angular dependence ; eta: hadroproduction ; channel cross section: energy dependence ; p p --> 2p eta ; spin: correlation
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  • Beschreibung: It is shown that most of the available data on the pp-->pp eta reaction, including the invariant mass distributions in the pp-->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 P-3(0) and P-3(2) states.
  • Zugangsstatus: Freier Zugang