https://inspirehep.net/literature/201708
Inspire Record
201708
DOI
10.17182/hepdata.30533https://doi.org/10.17182/hepdata.30533
We observe γγ → η′ production in the reaction e + e − → e + e − π + π − γ. We measure the product γ γγ ( η ′) B ( η ′ → ϱ 0 γ ) to be 1.14 ± 0.08 ± 0.11 keV. A first measurement of the γγ → η′ transition form factor is made for Q 2 up to 1 GeV 2 .
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