Measurement of the two-photon widths of thea 2,η′, η
0103 physical sciences
01 natural sciences
DOI:
10.1007/bf01614692
Publication Date:
2005-04-30T12:59:02Z
AUTHORS (28)
ABSTRACT
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 $$\begin{gathered} \Gamma _{\gamma \gamma } (a_2 ) = 1.26 \pm 0.26 \pm 0.18 keV, \hfill \\ \Gamma _{\gamma \gamma } (\eta ') = 4.6 \pm 1.1 \pm 0.6 keV, \hfill \\ \Gamma _{\gamma \gamma } (\eta ) = 0.51 \pm 0.12 \pm 0.05 keV. \hfill \\ \end{gathered} $$
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