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Measurement of the two-photon width of the eta '(958).

  • Author(s): Butler, F
  • Boyer, J
  • Gidal, G
  • Abrams, G
  • Amidei, D
  • Baden, AR
  • Gold, MS
  • Goldhaber, G
  • Golding, L
  • Haggerty, J
  • Herrup, D
  • Juricic, I
  • Kadyk, JA
  • Levi, ME
  • Nelson, ME
  • Rowson, PC
  • Schellman, H
  • Schmidke, WB
  • Sheldon, PD
  • Trilling, GH
  • Wood, DR
  • Riles, K
  • Perl, ML
  • Barklow, T
  • Boyarski, A
  • Burchat, PR
  • Burke, DL
  • Dorfan, JM
  • Feldman, GJ
  • Gladney, L
  • Hanson, G
  • Hayes, K
  • Hollebeek, RJ
  • Innes, WR
  • Jaros, JA
  • Karlen, D
  • Klein, SR
  • Lankford, AJ
  • Larsen, RR
  • LeClaire, BW
  • Lockyer, NS
  • Lüth, V
  • Ong, RA
  • Richter, B
  • Yelton, JM
  • Schaad, T
  • et al.

Published Web Location

https://doi.org/10.1103/physrevd.42.1368Creative Commons 'BY' version 4.0 license
Abstract

Using 203 pb-1 of data collected by the Mark II detector at the SLAC storage ring PEP, we have measured the radiative width of the for quasireal photons. The width is separately measured in the three reactions e+e-e+e-0+-,0; e+e-e+e-0+-; 0+-(0,), and e+e-e+e-0, giving a statistically weighted average two-photon width of=4.57±0.25±0.44 keV. As a byproduct of the study of the decay mode, we also measured the two-photon decay width of the a2(1320) as a2(1320)=1.03±0.13±0.21 keV. © 1990 The American Physical Society.

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