Measurement of the two-photon widths of thea 2,η′, η

Results of a measurement of the two-photon widths of thea2, η′, η with the detector MD-1 at thee+e− collider VEPP-4 are presented. The specific feature of this experiment is tagging of at least one scattered electron. The following results have been obtained $$\begin{gathered} \Gamma _{\gamma \gamma } (a_2 ) = 1.26 \pm 0.26 \pm 0.18 keV, \hfill \Gamma _{\gamma \gamma } (\eta ') = 4.6 \pm 1.1 \pm 0.6 keV, \hfill \Gamma _{\gamma \gamma }...