• Medientyp: E-Artikel
  • Titel: Backward pion-nucleon scattering
  • Beteiligte: Huang, F. [VerfasserIn]; Sibirtsev, A. [VerfasserIn]; Haidenbauer, J. [VerfasserIn]; Krewald, S. [VerfasserIn]; Meißner, U.-G. [VerfasserIn]
  • Erschienen: Springer, 2010
  • Erschienen in: The European physical journal / A 44, 81 - 92 (2010). doi:10.1140/epja/i2010-10930-2
  • Sprache: Englisch
  • DOI: https://doi.org/10.1140/epja/i2010-10930-2
  • ISSN: 1434-6001
  • Schlagwörter: pi- p: elastic scattering ; pi- p: charge exchange ; differential cross section: energy dependence ; polarization: asymmetry ; backscatter ; pi nucleon: scattering ; Regge poles ; numerical calculations ; differential cross section: momentum transfer ; tables ; baryon resonance: mass ; pi+ p: elastic scattering
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  • Beschreibung: A global analysis of the world data on differential cross-sections and polarization asymmetries of backward pion-nucleon scattering for invariant collision energies above 3 GeV is performed in a Regge model. Including the N alpha, N-gamma, Delta(delta) and Delta(beta) trajectories, we reproduce both angular distributions and polarization data for small values of the Mandelstam variable u, in contrast to previous analyses. The model amplitude is used to obtain evidence for baryon resonances with mass below 3 GeV. Our analysis suggests a G(39)-resonance with a mass of 2.83 GeV as member of the Delta(beta)-trajectory from the corresponding Chew-Frautschi plot.
  • Zugangsstatus: Freier Zugang