Generalized polarizabilities of the pion in chiral perturbation theory
C. Unkmeir, S. Scherer, A. I. L'vov, D. Drechsel
Abstract
We present a calculation of the virtual Compton scattering amplitude for γ+π γ+π in the framework of chiral perturbation theory at O(p4). We explicitly derive expressions for generalized electromagnetic polarizabilities and discuss alternative definitions of these quantities.
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