Is the scalar meson seen in CELLO data on γγrightarrowπ^+π^- ?
classification
✦ hep-ph
keywords
gammacellociterightarrowamplitudeanalysisanalyzeangular
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We analyze the CELLO angular distributions $\gamma\gamma\rightarrow\pi^+\pi^-$ with the unitary model \cite{KS-86} for helicity 2 amplitude. In contrast to previous analysis \cite{CELLO} we do not see any QED damping. The obtained S--wave does not contradict to low--energy theorem and demonstrates more clealy the resonance--like behaviour near 1.3 Gev.
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