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Pion Photoproduction off Nucleon with Hamiltonian Effective Field Theory

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arxiv 2201.11555 v2 pith:35UGKP5D submitted 2022-01-27 hep-ph nucl-th

classification hep-phnucl-th
keywords effectivehamiltoniannucleonphotoproductionpionscatteringtheoryamplitude
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abstract

We analyze the $\gamma N\to\pi N$ process in the negative parity channel with Hamiltonian effective filed theory which is successful in studying the nucleon resonances associated with the meson-nucleon scattering and lattice QCD simulations. We provide the scattering amplitude of pion photoproduction and extract the electric dipole amplitudes $E_{0+}$. The triquark component in $N^*(1535)$ is important for improving the consistence between our results and the experimental data.

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