Is the scalar meson seen in CELLO data on $\gamma \gamma \to {\pi }^{+}{\pi }^{-}$ ?

A. E. Kaloshin, V. M. Persikov

We analyze the CELLO angular distributions $\gamma \gamma \to {\pi }^{+}{\pi }^{-}$ with the unitary model \cite{KS-86} for helicity 2 amplitude. In contrast to previous analysis \cite{CELLO} we do n…