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

• DOI: 10.1007/bf01614692
• Publication Date: 2005-04-30T12:59:02Z
• Authors: S. E. Baru; A. E. Blinov; V. E. Blinov; A. E. Bondar; A. D. Bukin; Yu. I. Eidelman; V. R. Groshev; V. A. Kiselev; S. G. Klimenko; G. M. Kolachev; S. I. Mishnev; A. P. Onuchin; V. S. Panin; V. V. Petrov; I. Ya. Protopopov; A. G. Shamov; V. A. Sidorov; Yu. I. Skovpen; A. N. Skrinsky; V. A. Tayursky; V. I. Telnov; A. B. Temnykh; Yu. A. Tikhonov; G. M. Tumaikin; A. E. Undrus; A. I. Vorobiov; V. N. Zhilich; A. A. Zholents
• Keywords: 0103 physical sciences; 01 natural sciences

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 $$\begin{gathered} \Gamma _{\gamma \gamma } (a_2 ) = 1.26 \pm 0.26 \pm 0.18 keV, \hfill \\ \Gamma _{\gamma \gamma } (\eta ') = 4.6 \pm 1.1 \pm 0.6 keV, \hfill \\ \Gamma _{\gamma \gamma } (\eta ) = 0.51 \pm 0.12 \pm 0.05 keV. \hfill \\ \end{gathered} $$