Hard pion bremsstrahlung in the Coulomb region

Details Hard pion bremsstrahlung in the Coulomb region Hard pion bremsstrahlung in the Coulomb region

2007-08-02

arxiv.org/abs/0708.0351v1

Phys.Rev.C76:064607,2007

Physics

Nuclear Physics

Nuclear Theory

18 pages, 5 figures

Scientific paper

10.1103/PhysRevC.76.064607

Hard high-energy pion-nucleus bremsstrahlung, $\pi^- +A\to\pi^- +\gamma +A$, is studied in the Coulomb region, i.e. the small-angle region where the nuclear scattering is dominated by the Coulomb interaction. Special attention is focussed on the possibility of measuring the pion polarizability in such reactions. We study the sensitivity to the structure of the underlying the pion-Compton amplitude through a model with $\sigma$, $\rho$, and a_1 exchanges. It is found that the effective energy in the virtual pion-Compton scattering is often so large that the threshold approximation does not apply.

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