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Physics  2014 

Two photon couplings of the lightest isoscalars from BELLE data

DOI: 10.1016/j.physletb.2014.07.005

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Abstract:

Amplitude Analysis of two photon production of $\pi\pi$ and ${\overline K}K$, using S-matrix constraints and fitting all available data, including the latest precision results from Belle, yields a single partial wave solution up to 1.4 GeV. The two photon couplings of the $\sigma/f_0(500)$, $f_0(980)$ and $f_2(1270)$ are determined from the residues of the resonance poles.

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