A measurement of the reaction e+e- →e+e-η′ and the radiative width Γη′→γγ at petra

W. Bartel, D. Cords, P. Dittmann, R. Eichler, R. Felst, D. Haidt, H. Krehbiel, K. Meier, B. Naroska, L. H. O'Neill, P. Steffen, H. Wenninger, E. Elsen, A. Petersen, P. Warming, G. Weber, S. Bethke, H. Drumm, J. Heintze, G. HeinzelmannK. H. Hellenbrand, R. D. Heuer, J. von Krogh, P. Lennert, S. Kawabata, S. Komamiya, H. Matsumura, T. Nozaki, J. Olsson, H. Rieseberg, A. Wagner, A. Bell, F. Foster, G. Hughes, H. Wriedt, J. Allison, A. H. Ball, G. Bamford, R. Barlow, C. Bowdery, I. P. Deurdoth, J. F. Hassard, B. T. King, F. K. Loebinger, A. A. Macbeth, H. McCann, H. E. Mills, P. G. Murphy, K. Stephens, D. Clarke, M. C. Goddard, R. Marshall, G. F. Pearce, J. Kanzaki, T. Kobayashi, M. Koshiba, M. Minowa, M. Nozaki, S. Odaka, S. Orito, A. Sato, H. Takeda, Y. Totsuka, Y. Watanabe, S. Yamada, C. Yanagisawa

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The reaction e+e- → e+e-η' has been observed in the JADE experiment at PETRA, by detecting the final state π+π-γ, resulting from the decay η' → γρ{variant}0. The cross section was measured at an average beam energy of 17.15 GeV to be σ(e+e- → e+e-η') = 2.2 ± 0.2 (stat.) ± 0.4(syst.) nb, yielding the radiative width Γη'γγ= 5.0 ± 0.5(stat.) ± 0.9 (syst.) keV.

Original languageEnglish
Pages (from-to)190-194
Number of pages5
JournalPhysics Letters B
Issue number2
Publication statusPublished - 1982 Jun 10


ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Bartel, W., Cords, D., Dittmann, P., Eichler, R., Felst, R., Haidt, D., Krehbiel, H., Meier, K., Naroska, B., O'Neill, L. H., Steffen, P., Wenninger, H., Elsen, E., Petersen, A., Warming, P., Weber, G., Bethke, S., Drumm, H., Heintze, J., ... Yanagisawa, C. (1982). A measurement of the reaction e+e- →e+e-η′ and the radiative width Γη′→γγ at petra. Physics Letters B, 113(2), 190-194. https://doi.org/10.1016/0370-2693(82)90422-1