Generalized polarizabilities of the pion in chiral perturbation theory
classification
✦ hep-ph
hep-exnucl-exnucl-th
keywords
chiralgammageneralizedperturbationpolarizabilitiestheoryalternativeamplitude
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We present a calculation of the virtual Compton scattering amplitude for $\gamma^\ast+\pi\to \gamma+\pi$ in the framework of chiral perturbation theory at ${\cal O}(p^4)$. We explicitly derive expressions for generalized electromagnetic polarizabilities and discuss alternative definitions of these quantities.
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