Double and single pion photoproduction within a dynamical coupled-channels model

Abstract

Within a dynamical coupled-channels model which has already been fixed from analyzing the data of the pi N -> pi N and gamma N -> pi N reactions, we present the predicted double pion photoproduction cross sections up to the second resonance region, W< 1.7 GeV. The roles played by the different mechanisms within our model in determining both the single and double pion photoproduction reactions are analyzed, focusing on the effects due to the direct gamma N -> pi pi N mechanism, the interplay between the resonant and non-resonant amplitudes, and the coupled-channels effects. The model parameters which can be determined most effectively in the combined studies of both the single and double pion photoproduction data are identified for future studies.

Version to appear in PRC. 16 pages, 13 figures

References in corpus (7)

• Dynamical coupled-channel model of meson production reactions in the nucleon resonance region
• Dynamical Coupled-Channel Model of $\pi N$ Scattering in the W $\le$ 2 GeV Nucleon Resonance Region
• New results on the Roper resonance and the P_{11} partial wave
• Dynamical Coupled-Channels Effects on Pion Photoproduction
• Dynamical coupled-channels analysis of 1H(e,e'pi)N reactions
• Dynamical coupled-channels study of pi N --> pi pi N reactions
• Beam-Helicity Asymmetries in Double Pion Photoproduction off the Proton

Cited by in corpus (27)

• Progress Toward Understanding Baryon Resonances
• Studies of Nucleon Resonance Structure in Exclusive Meson Electroproduction
• Nucleon resonances within a dynamical coupled-channels model of pi N and gamma N reactions
• Electroexcitation of nucleon resonances
• Coupled-channel dynamics in the reactions piN --> piN, etaN, KLambda, KSigma
• A study of the $P_{11}(1440)$ and $D_{13}(1520)$ resonances from CLAS data on $ep\to e^{\prime }{\pi }^{+}{\pi }^{-}{p}^{\prime }$
• New Results from the Studies of the $N(1440)1/2^{+}$, $N(1520)3/2^{-}$, and $\Delta (1620)1/2^{-}$ Resonances in Exclusive $ep\to e^{\prime }{p}^{\prime }{\pi }^{+}{\pi }^{-}$ Electroproduction with the CLAS Detector
• Pion photoproduction in a dynamical coupled-channels model
• Dynamical coupled-channels model of $K^{-}p$ reactions (I): Determination of partial-wave amplitudes
• Dynamical coupled-channels model of $K^{-}p$ reactions (II): Extraction of ${\Lambda }^{\ast }$ and ${\Sigma }^{\ast }$ hyperon resonances
• Study of the gamma p --> pi0 pi0 p reaction with the Crystal Ball/TAPS at the Mainz
• Electromagnetic Transition Form Factors of Baryon Resonances
• Evaluation of the polarization observables I^S and I^C in the reaction gamma p --> pi^0 eta p
• Role of the possible ${\Sigma }^{\ast }({\frac{1}{2}}^{-})$ state in the $\Lambda p\to \Lambda p{\pi }^0$ reaction
• Sign ambiguity in the K Sigma channel
• Pole structure from energy-dependent and single-energy fits to $\pi N$ elastic scattering data
• Role of the ${\Delta }^{\ast }(1940)$ in the ${\pi }^{+}p\to K^{+}{\Sigma }^{+}(1385)$ and $pp\to n{K}^{+}{\Sigma }^{+}(1385)$ reactions
• Toward establishing low-lying $\Lambda$ and $\Sigma$ hyperon resonances with the $\bar{K}+d\to \pi +Y+N$ reaction
• Role of the $N^{\ast }(2080)$ in $pp\to p{K}^{+}\Lambda (1520)$ and ${\pi }^{-}p\to K^0\Lambda (1520)$ reactions
• Pion photoproduction of nucleon excited states with Hamiltonian effective field theory
• Photon induced K$\Lambda$ production on the proton in the low energy region
• Role of $\Lambda (1670)$ in the $\gamma p\to K^{+}\eta \Lambda$ reaction near threshold
• Theory of two-pion photo- and electroproduction off the nucleon
• Chiral perturbation theory calculation for pn -> dpipi at threshold
• Light-quark baryon spectroscopy within ANL-Osaka dynamical coupled-channels approach
• Complex phase structure of the meson-baryon $T$-matrix
• Glimpsing Colour in a World of Black and White