Antiproton-Proton Annihilation into Electron-Positron Pairs and Gamma-Ray Pairs
- 25 August 1969
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 184 (5), 1415-1423
- https://doi.org/10.1103/physrev.184.1415
Abstract
Experimental limits have been set on the cross sections for for antiprotons with incident momenta of 1.47 and 2.40 GeV/c. These results imply upper limits on the magnitude of the proton form factors for timelike four-momentum transfer of 5.1 and 6.6 . The reaction has been studied at the same incident momenta. This process has apparently been observed for incident antiproton momentum of 1.47 GeV/c, while an upper limit for the two-photon annihilation cross section is found at 2.40-GeV/c incident momentum.
Keywords
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