Phys. Rev. Lett. 34, 907 - 910 (1975)Direct Electron-Positron Pair Production by 200-GeV Negative Pions |
L. R. Fortney, A. T. Goshaw, J. W. Lamsa, J. S. Loos, D. A. Niemi, W. J. Robertson, and W. D. Walker
Physics Department, Duke University, Durham, North Carolina 27706
Received 13 January 1975
We have studied direct electron-positron pair production by the collision of 200-GeV π- mesons with a neon target. The data consist of 622 direct pairs with momenta ranging from 10 MeV/c to 7.5 GeV/c. We have measured the total production rate to an accuracy of 10% and studied the relevant momentum and electron-positron momentum partition spectra. In contrast to several recent experiments, we find excellent agreement with the predictions of quantum electrodynamic calculations.
©1975 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v34/p907
DOI: 10.1103/PhysRevLett.34.907
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