English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

As a first step to analyze the electromagnetic meson production reactions inthe nucleon resonance region, the parameters of the hadronic interactions of adynamical coupled-channel model, developed in {\it Physics Reports 439, 193(2007)}, are determined by fitting the $\pi N$ scattering data. The channelsincluded in the calculations are $\pi N$, $\eta N$ and $\pi\pi N$ which has$\pi\Delta$, $\rho N$, and $\sigma N$ resonant components. The non-resonantmeson-baryon interactions of the model are derived from a set of Lagrangians byusing a unitary transformation method. One or two bare excited nucleon statesin each of $S$, $P$, $D$, and $F$ partial waves are included to generate theresonant amplitudes in the fits. The parameters of the model are firstdetermined by fitting as much as possible the empirical $\pi N$ elasticscattering amplitudes of SAID up to 2 GeV. We then refine and confirm theresulting parameters by directly comparing the predicted differential crosssection and target polarization asymmetry with the original data of the elastic$\pi^{\pm} p \to \pi^{\pm} p$ and charge-exchange $\pi^- p \to \pi^0 n$processes. The predicted total cross sections of $\pi N$ reactions and $\piN\to \eta N$ reactions are also in good agreement with the data. Applicationsof the constructed model in analyzing the electromagnetic meson production dataas well as the future developments are discussed.

Dynamical Coupled-Channel Model of $\pi N$ Scattering in the W $\leq$ 2 GeV Nucleon Resonance Region