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 language | English (US) |
|---|---|
| Pages (from-to) | 487-492 |
| Number of pages | 6 |
| Journal | Physics Letters B |
| Volume | 147 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 15 1984 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
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Measurement of the radiative width of the η′(958) in two-photon interactions. / 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.; Wedemeyer, R.; Eskreys, A.; Gather, K.; Hultschig, H.; Joos, P.; Kötz, U.; Kowalski, H.; Ladage, A.; Löhr, B.; Lüke, D.; Mättig, P.; Notz, D.; Nowak, R. J.; Pyrlik, J.; Ronat, E.; Rushton, M.; Schütte, W.; Trines, D.; Tymieniecka, T.; Wolf, G.; Yekutieli, G.; Xiao, Ch; Fohrmann, R.; Hilger, E.; Kracht, T.; Krasemann, H. L.; Leu, P.; Lohrmann, E.; Pandoulas, D.; Poelz, G.; Pösnecker, K. U.; Wiik, B. H.; Beuselinck, R.; Binnie, D. M.; Dornan, P.; Foster, B.; Garbutt, D. A.; Jenkins, C.; Jones, T. D.; Jones, W. G.; McCardle, J.; Sedgbeer, K. J.; Thomas, J.; Wan Abdullah, W. A.T.; Bell, K. W.; Bowler, M. G.; Bull, P.; Cashmore, R. J.; Clarke, P. E.L.; Devenish, R.; Grossmann, P.; Hawkes, C. M.; Lloyd, S. L.; Youngman, C.; Forden, G. E.; Hart, J. C.; Harvey, J.; Hasell, D. K.; Saxon, D. H.; Barreiro, F.; Brandt, S.; Dittmar, M.; Holder, M.; Kreutz, G.; Neumann, B.; Duchovni, E.; Eisenberg, Y.; Karshon, U.; Mikenberg, G.; Mir, R.; Revel, D.; Shapira, A.; Winik, M.; Baranko, G.; Caldwell, A.; Cherney, M.; Izen, J. M.; Mermikides, M.; Ritz, S.; Rudolph, G.; Strom, D.; Takashima, M.; Venkataramania, H.; Wicklund, E.; Wu, Sau Lan; Zobernig, G.
In: Physics Letters B, Vol. 147, No. 6, 15.11.1984, p. 487-492.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Measurement of the radiative width of the η′(958) in two-photon interactions
AU - Althoff, M.
AU - Braunschweig, W.
AU - Kirschfink, F. J.
AU - Lübelsmeyer, K.
AU - Martyn, H. U.
AU - Rosskamp, P.
AU - Sander, H. G.
AU - Schmitz, D.
AU - Siebke, H.
AU - Wallraff, W.
AU - Eisenmann, J.
AU - Fischer, H. M.
AU - Hartmann, H.
AU - Jocksch, A.
AU - Knop, G.
AU - Köpke, L.
AU - Kolanoski, H.
AU - Kück, H.
AU - Mertens, V.
AU - Wedemeyer, R.
AU - Eskreys, A.
AU - Gather, K.
AU - Hultschig, H.
AU - Joos, P.
AU - Kötz, U.
AU - Kowalski, H.
AU - Ladage, A.
AU - Löhr, B.
AU - Lüke, D.
AU - Mättig, P.
AU - Notz, D.
AU - Nowak, R. J.
AU - Pyrlik, J.
AU - Ronat, E.
AU - Rushton, M.
AU - Schütte, W.
AU - Trines, D.
AU - Tymieniecka, T.
AU - Wolf, G.
AU - Yekutieli, G.
AU - Xiao, Ch
AU - Fohrmann, R.
AU - Hilger, E.
AU - Kracht, T.
AU - Krasemann, H. L.
AU - Leu, P.
AU - Lohrmann, E.
AU - Pandoulas, D.
AU - Poelz, G.
AU - Pösnecker, K. U.
AU - Wiik, B. H.
AU - Beuselinck, R.
AU - Binnie, D. M.
AU - Dornan, P.
AU - Foster, B.
AU - Garbutt, D. A.
AU - Jenkins, C.
AU - Jones, T. D.
AU - Jones, W. G.
AU - McCardle, J.
AU - Sedgbeer, K. J.
AU - Thomas, J.
AU - Wan Abdullah, W. A.T.
AU - Bell, K. W.
AU - Bowler, M. G.
AU - Bull, P.
AU - Cashmore, R. J.
AU - Clarke, P. E.L.
AU - Devenish, R.
AU - Grossmann, P.
AU - Hawkes, C. M.
AU - Lloyd, S. L.
AU - Youngman, C.
AU - Forden, G. E.
AU - Hart, J. C.
AU - Harvey, J.
AU - Hasell, D. K.
AU - Saxon, D. H.
AU - Barreiro, F.
AU - Brandt, S.
AU - Dittmar, M.
AU - Holder, M.
AU - Kreutz, G.
AU - Neumann, B.
AU - Duchovni, E.
AU - Eisenberg, Y.
AU - Karshon, U.
AU - Mikenberg, G.
AU - Mir, R.
AU - Revel, D.
AU - Shapira, A.
AU - Winik, M.
AU - Baranko, G.
AU - Caldwell, A.
AU - Cherney, M.
AU - Izen, J. M.
AU - Mermikides, M.
AU - Ritz, S.
AU - Rudolph, G.
AU - Strom, D.
AU - Takashima, M.
AU - Venkataramania, H.
AU - Wicklund, E.
AU - Wu, Sau Lan
AU - Zobernig, G.
N1 - Funding Information: In this reaction we have measured the two photon partial width of the r/' and searched for other resonances in this final state, in particular for the t(1440) which possibly \[6\]h as been observed in the/903 ' final state. The measurement was performed using the TASSO detector at PETRA, at beam energies of 7-18 GeV. The scattered electron and positron in the final state were not detected since they are predominantly emitted at very small angles. The main difficulty in the measurement of this decay mode lies in the detection of a low energy photon ((E. r) ~ 0.2 GeV). Consequently, a careful evaluation of the response of the electromagnetic detector for low energy 1 Present address: CERN, Geneva, Switzerland. 2 Present address: University of California, Santa Cruz, CA, USA. 3 On leave from Institute of Nuclear Physics, Cracow, Poland. 4 On leave from Warsaw University, Poland. s On leave from Weizmann Institute, Rehovot, Israel. 6 Present address: University of Science and Technology of China, Hefei, The People's Republic of China. 7 On leave from Universiti Malaya, Kuala Lumpur, Malaysia. 8 Supported by the Deutsches Bundesministerium for For-schung und Technologie. 9 Supported by the UK Science and Engineering Research Council. l0 Supported by the Minerva Gesellschaft t'fir Forschung mbH. 11 Supported by the US Department of Energy contract DE-AC02-76ER00881. Funding Information: We gratefully acknowledge the support by the DESY directorate and the PETRA machine group. We wish to thank the technical service groups at DESY and all the engineers and technicians at the collaborating institutions for their invaluable help. Those of us from outside DESY wish to thank the DESY directorate for the hospitality extended to us while working at DESY.
PY - 1984/11/15
Y1 - 1984/11/15
N2 - 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).
AB - 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).
UR - http://www.scopus.com/inward/record.url?scp=0042219918&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0042219918&partnerID=8YFLogxK
U2 - 10.1016/0370-2693(84)91409-6
DO - 10.1016/0370-2693(84)91409-6
M3 - Article
AN - SCOPUS:0042219918
VL - 147
SP - 487
EP - 492
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 6
ER -