$\pi$NN coupling and two-pion photoproduction on the nucleon

Abstract

Effects of non-resonant photoproductions arising from two different $\pi NN$ couplings are investigated in the $\gamma N\to \pi \pi N$ reaction. We find that the pseudoscalar (PS) $\pi NN$ coupling is generally preferable to the pseudovector (PV) $\pi NN$ coupling and particularly the total cross sections are successfully described by the model with the PS $\pi NN$ coupling. In order to see the difference between the two couplings, we also show the results of invariant mass spectra and helicity-dependent cross sections in various isospin channels calculated with the PS and PV couplings.

arXiv comment35 pages, 11 figures, minor changes and version to be published in Phys.Rev.C

References in corpus (5)

• A unitary isobar model for pion photo- and electroproduction on the proton up to 1 GeV
• The role of Delta(1700) excitation and rho production in double pion photoproduction
• Photoabsorption on a Nucleon in the D_{13} Resonance Energy Region
• Study of polarization observables in double pion photoproduction on the proton
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Cited by in corpus (12)

• Dynamical coupled-channel model of meson production reactions in the nucleon resonance region
• Double pion photoproduction on nucleon and deuteron
• Phenomenological analysis of the double pion production in nucleon-nucleon collisions up to 2.2 GeV
• High statistics study of the reaction $\gamma p\to p2{\pi }^0$
• Model Analysis of the $ep\to e{p}^{\prime }{\pi }^{+}{\pi }^{-}$ Electroproduction Reaction on the Proton
• The Gerasimov-Drell-Hearn Sum Rule and the Spin Structure of the Nucleon
• Hadron structure at low Q^2
• Beam-Helicity Asymmetries in Double Pion Photoproduction off the Proton
• Electroproduction of p π^{+} π^{-} off protons at 0.2<Q^{2}<0.6 GeV^{2} and 1.3<W<1.57 GeV with CLAS
• Helicity asymmetries in double pion photoproduction on the proton
• Theory of two-pion photo- and electroproduction off the nucleon
• Coupled-channel contributions to the GDH sum rule from the Jülich-Bonn approach