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Backward pion-nucleon scattering

  • Regular Article - Theoretical Physics
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Abstract

A global analysis of the world data on differential cross-sections and polarization asymmetries of backward pion-nucleon scattering for invariant collision energies above 3GeV is performed in a Regge model. Including the \(\ensuremath N_{\alpha}\) , \(\ensuremath N_{\gamma}\) , \(\ensuremath \Delta_{\delta}\) and \(\ensuremath \Delta_{\beta}\) 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 3GeV. Our analysis suggests a \(\ensuremath G_{39}\) -resonance with a mass of 2.83GeV as member of the \(\ensuremath \Delta_{\beta}\) -trajectory from the corresponding Chew-Frautschi plot.

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Author information

Authors and Affiliations

  1. Department of Physics and Astronomy, The University of Georgia, 30602, Athens, GA, USA

    F. Huang

  2. Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, D-53115, Bonn, Germany

    A. Sibirtsev & U. -G. Meißner

  3. Excited Baryon Analysis Center (EBAC), Thomas Jefferson National Accelerator Facility, 23606, Newport News, VA, USA

    A. Sibirtsev

  4. Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425, Jülich, Germany

    J. Haidenbauer, S. Krewald & U. -G. Meißner

  5. Institute for Advanced Simulation, Forschungszentrum Jülich, D-52425, Jülich, Germany

    J. Haidenbauer, S. Krewald & U. -G. Meißner

Authors
  1. F. Huang
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  2. A. Sibirtsev
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  3. J. Haidenbauer
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  4. S. Krewald
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  5. U. -G. Meißner
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Corresponding author

Correspondence to J. Haidenbauer.

Additional information

Communicated by V. Vento

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Huang, F., Sibirtsev, A., Haidenbauer, J. et al. Backward pion-nucleon scattering. Eur. Phys. J. A 44, 81–92 (2010). https://doi.org/10.1140/epja/i2010-10930-2

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  • DOI: https://doi.org/10.1140/epja/i2010-10930-2

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