$π$NN coupling and two-pion photoproduction on the nucleon

Details $π$NN coupling and two-pion photoproduction on the nucleon $π$NN coupling and two-pion photoproduction on the nucleon

2002-10-22

arxiv.org/abs/nucl-th/0210063v2

Phys.Rev. C67 (2003) 034601

Physics

Nuclear Physics

Nuclear Theory

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

Scientific paper

10.1103/PhysRevC.67.034601

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.

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