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VOLUME 44 (1986) | ISSUE 11 | PAGE 493
Observation of the process e+e--γγγγ
The quantum electrodynamic process e+e~ -*γγγγ was studied with the VEPP-2M electron-positron storage ring in the energy interval 2E = 0.5-1.4 GeV. The integrated cross section in the kinematic region of large momentum transfer, angular distribution of photons, energy spectra, and spectra of the effective masses of photon pairs were measured.