# $π^$ and $π^0$ Polarizabilities from {$γγ ightarrowππ$} Data on the Base of S-Matrix Approach

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We suggest the most model-independent and simple description of the $\gamma\gamma ightarrow\pi\pi$ process near threshold in framework of S-matrix approach. The amplitudes contain the pion polarizabilities and rather restricted information about $\pi \pi$ interaction. Application of these formulae for description of MARK-II \cite{M2} and Crystal Ba

Autor: A. E. Kaloshin; V. V. Serebryakov

Fuente: https://archive.org/