A Measurement of the Reaction $e^+ e^- \to e^+ e^- \eta^\prime$ and the Radiative Width $\Gamma (\eta^\prime \to \gamma \gamma$) 
at {PETRA}

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 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 Γ η'γγ = 5.0 ± 0.5(stat.) ± 0.9 (syst.) keV.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: INELASTIC SCATTERING
INELASTIC SCATTERING: ELECTRON POSITRON
PHOTON PHOTON: INTERACTION
INTERACTION: PHOTON PHOTON
ETA(958): ELECTROPRODUCTION
ELECTROPRODUCTION: ETA(958)
ETA(958): RADIATIVE DECAY
RADIATIVE DECAY: ETA(958)

References(22)

Figures(0)

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