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- W2035781738 abstract "We perform an amplitude analysis of the world published data on γγ→π+π- and π0π0. These are dominated in statistics by the recently published results from Belle on the charged pion channel. Nevertheless, having only limited angular information, a range of solutions remain possible. We present two solutions with Γ(f0(980)→γγ)=0.42 and 0.10 keV, and Γ(f2(1270)→γγ)=3.14±0.20 and 3.82 ± 0.30 keV, respectively: the former being the solution favoured by χ2, the latter at the edge of acceptability. Models of the structure of the f0(980) predict two photon widths to be between 0.2 and 0.6 keV, depending on its composition as mainly K̄K, s̄s or qq̄qq. Presently available data cannot yet distinguish unambiguously between these predictions. However, we show how forthcoming results on γγ→π0π0 can not only discriminate between, but also refine, these classes of partial wave solutions." @default.
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- W2035781738 date "2008-06-27" @default.
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- W2035781738 title "Amplitude analysis of high statistics results on γγ→π+π- and the two photon width of isoscalar states" @default.
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- W2035781738 doi "https://doi.org/10.1140/epjc/s10052-008-0648-9" @default.
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