Photon-Photon Scattering, Pion Polarizability and Chiral Symmetry

Details Photon-Photon Scattering, Pion Polarizability and Chiral Symmetry Photon-Photon Scattering, Pion Polarizability and Chiral Symmetry

1993-02-02

arxiv.org/abs/hep-ph/9302203v1

Phys.Rev.D48:137-146,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages(+10 figures available on request), LATEX, UMHEP-383

Scientific paper

10.1103/PhysRevD.48.137

Recent attempts to detect the pion polarizability via analysis of $\gamma\gamma\rightarrow\pi\pi$ measurements are examined. The connection between calculations based on dispersion relations and on chiral perturbation theory is established by matching the low energy chiral amplitude with that given by a full dispersive treatment. Using the values for the polarizability required by chiral symmetry, predicted and experimental cross sections are shown to be in agreement.

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