Experimental investigation of strong field trident production
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology2010Vol. 82(7)
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J. Esberg, K. Kirsebom, H. Knudsen, Heine Dølrath Thomsen, E. Uggerhøj, E. Uggerhøj, P. Sona, A. Mangiarotti, T. Ketel, A. Dizdar, M. M. Dalton, S. Ballestrero, S. H. Connell
Abstract
We show by experiment that an electron impinging on an electric field that is of critical magnitude in its rest frame, may produce an electron-positron pair. Our measurements address higher-order QED, using the strong electric fields obtainable along particular crystallographic directions in single crystals. For the amorphous material our data are in good agreement with theory, whereas a discrepancy with theory on the magnitude of the trident enhancement is found in the precisely aligned case where the strong electric field acts.
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