Measurement of the radiative width of the η′(958) in two-photon interactions

M. Althoff, W. Braunschweig, F. J. Kirschfink, K. Lübelsmeyer, H. U. Martyn, P. Rosskamp, H. G. Sander, D. Schmitz, H. Siebke, W. Wallraff, J. Eisenmann, H. M. Fischer, H. Hartmann, A. Jocksch, G. Knop, L. Köpke, H. Kolanoski, H. Kück, V. Mertens, R. WedemeyerA. Eskreys, K. Gather, H. Hultschig, P. Joos, U. Kötz, H. Kowalski, A. Ladage, B. Löhr, D. Lüke, P. Mättig, D. Notz, R. J. Nowak, J. Pyrlik, E. Ronat, M. Rushton, W. Schütte, D. Trines, T. Tymieniecka, G. Wolf, G. Yekutieli, Ch Xiao, R. Fohrmann, E. Hilger, T. Kracht, H. L. Krasemann, P. Leu, E. Lohrmann, D. Pandoulas, G. Poelz, K. U. Pösnecker, B. H. Wiik, R. Beuselinck, D. M. Binnie, P. Dornan, B. Foster, D. A. Garbutt, C. Jenkins, T. D. Jones, W. G. Jones, J. McCardle, K. J. Sedgbeer, J. Thomas, W. A.T. Wan Abdullah, K. W. Bell, M. G. Bowler, P. Bull, R. J. Cashmore, P. E.L. Clarke, R. Devenish, P. Grossmann, C. M. Hawkes, S. L. Lloyd, C. Youngman, G. E. Forden, J. C. Hart, J. Harvey, D. K. Hasell, D. H. Saxon, F. Barreiro, S. Brandt, M. Dittmar, M. Holder, G. Kreutz, B. Neumann, E. Duchovni, Y. Eisenberg, U. Karshon, G. Mikenberg, R. Mir, D. Revel, A. Shapira, M. Winik, G. Baranko, A. Caldwell, M. Cherney, J. M. Izen, M. Mermikides, S. Ritz, G. Rudolph, D. Strom, M. Takashima, H. Venkataramania, E. Wicklund, Sau Lan Wu, G. Zobernig

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Abstract

The reaction e+e-→e+e-η′(9 58) has been observed by detecting the final state π+π-γ. The two-photon width of the η′ has been measured to be Γ(η′→γγ) = 5.1±0.4±0.7 keV. A search for the ι(1440) has been made in the ρ{variant}0γ final state. An upper limit has been obtained for the product Γ(ι(1440) → γ)gg), B (ι→ρ{variant}0γ) <1.5 keV (95%CL).

Original languageEnglish (US)
Pages (from-to)487-492
Number of pages6
JournalPhysics Letters B
Volume147
Issue number6
DOIs
StatePublished - Nov 15 1984
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    Althoff, M., Braunschweig, W., Kirschfink, F. J., Lübelsmeyer, K., Martyn, H. U., Rosskamp, P., Sander, H. G., Schmitz, D., Siebke, H., Wallraff, W., Eisenmann, J., Fischer, H. M., Hartmann, H., Jocksch, A., Knop, G., Köpke, L., Kolanoski, H., Kück, H., Mertens, V., ... Zobernig, G. (1984). Measurement of the radiative width of the η′(958) in two-photon interactions. Physics Letters B, 147(6), 487-492. https://doi.org/10.1016/0370-2693(84)91409-6