Helicity asymmetries in double pion photoproduction on the proton

Abstract

Based on a prior model on double pion photoproduction on the proton, successfully tested in total cross sections and invariant mass distributions, we make a theoretical study of the angular dependence of helicity asymmetries from the interaction of circularly polarized photons with unpolarized protons. We show that this observable is sensitive to details of the internal mechanisms and, thus, represents a complementary test of the theoretical model.

arXiv comment16 pages, 6 figures, version accepted for publication in Nuclear Physics A

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Cited by in corpus (15)

• Progress Toward Understanding Baryon Resonances
• Beam-Helicity Asymmetries in Double-Charged-Pion Photoproduction on the Proton
• Photoproduction of mesons off nuclei
• Study of the gamma p --> pi0 pi0 p reaction with the Crystal Ball/TAPS at the Mainz
• Beam-Helicity Asymmetries in Double Pion Photoproduction off the Proton
• Photoproduction of pi0pi0 and pi0pi+-pairs off the proton from threshold to the second resonance region
• Measurement of the beam-helicity asymmetry $I^{\odot }$ in the photoproduction of ${\pi }^0$-pairs off the proton and off the neutron
• First measurement of the circular beam asymmetry in the gamma p --> pi0 eta p reaction
• Evaluation of the polarization observables I^S and I^C in the reaction gamma p --> pi^0 eta p
• Measurement of the beam-helicity asymmetry $I^{\odot }$ in the photoproduction of ${\pi }^0{\pi }^{\pm }$-pairs off protons and off neutrons
• Polarization observables in ${\pi }^0\eta$-photoproduction on the proton
• Sequential single pion production explaining the dibaryon "$d^{\ast }(2380)$" peak
• Reply to "Comment on Sequential Single-pion Production Explaining the dibaryon $d^{\ast }(2380)$ peak''
• Theory of two-pion photo- and electroproduction off the nucleon
• Quasi-free photoproduction of pion-pairs off protons and neutrons