Is the scalar meson seen in CELLO data on γγ→π+π- ?
A. E. Kaloshin, V. M. Persikov
Abstract
We analyze the CELLO angular distributions γγ→π+π- with the unitary model KS-86 for helicity 2 amplitude. In contrast to previous analysis 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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