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Analysis of the quadrupole deformation of Δ(1232) within an effective Lagrangian model for pion photoproduction from the nucleon

Abstract.

We present an extraction of the E2/M1 ratio of the Δ(1232) from experimental data applying an effective Lagrangian model. We compare the result obtained with different nucleonic models and we reconcile the experimental results with the lattice QCD calculations.

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Fernández-Ramırez, C., Moya de Guerra, E. & Udıas, J.M. Analysis of the quadrupole deformation of Δ(1232) within an effective Lagrangian model for pion photoproduction from the nucleon. Eur. Phys. J. A 31, 572–574 (2007). https://doi.org/10.1140/epja/i2006-10198-1

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  • DOI: https://doi.org/10.1140/epja/i2006-10198-1

PACS.

  • 14.20.Gk Baryon resonances with S = 0
  • 25.20.Lj Photoproduction reactions
  • 13.60.Le Meson production