Measurement of direct electron-positron pair production from hadronic bremsstrahlung

A. T. Goshaw; L. E. Evans; L. R. Fortney; J. S. Loos; W. J. Robertson; W. D. Walker; R. C. Field; V. Chaloupka; P. J. Dornan; G. Hall; A. P. White

doi:10.1103/PhysRevD.24.2829

Access by Xinjiang University

Measurement of direct electron-positron pair production from hadronic bremsstrahlung

A. T. Goshaw, L. E. Evans, L. R. Fortney, J. S. Loos^*, W. J. Robertson, and W. D. Walker

R. C. Field and V. Chaloupka

P. J. Dornan, G. Hall, and A. P. White

Duke University, Durham, North Carolina 27706

Stanford Linear Accelerator Center, Stanford, California 94305

Imperial College, London, England

^*Now at Argonne National Laboratory, Argonne, IL 60439.

PDF

Phys. Rev. D 24, 2829 – Published 1 December, 1981

DOI: https://doi.org/10.1103/PhysRevD.24.2829

Abstract

We have made a measurement of very-low-energy $e^{+} e^{-}$ pair production from $π^{\pm} p$ collisions at 18 GeV/c. Using the SLAC 1-m bubble chamber to study a sample of 178× $10^{3}$ interactions, we find a signal of centrally produced direct $e^{+} e^{-}$ pairs which accounts for (48±13)% of all $e^{+} e^{-}$ pairs detected with $| x | < 0.02$ and $P_{T} < 10$ MeV/c. This measurement agrees with a calculation of $e^{+} e^{-}$ pair production from the internal conversion of hadronic bremsstrahlung.

References (14)

R. Ruckl, Phys. Lett. 64B, 39 (1976) N. S. Craigie and H. N. Thompson, Nucl. Phys. B141, 121 (1978) N. S. Craigie, Phys. Rep. 47, 1 (1978)
L. M. Lederman, Phys. Rep. 26C, 149 (1976) J. W. Cronin, in Proceedings of the International Symposium on Lepton and Photon Interactions at High Energies, Hamburg, 1977, edited by F. Gutbrod (DESY, Hamburg, 1977) L. M. Lederman, in Proceedings of the 19th International Conference on High Energy Physics, Tokyo, 1978, edited by S. Homma, M. Kawaguchi, and H. Miyazawa (Phys. Soc. of Japan, Tokyo, 1979) S. Mikamo, INS Symposium on Particle Physics in the GeV Region, Tokyo, 1979 (unpublished)
F. E. Low, Phys. Rev. 110, 974 (1958) T. H. Burnett and M. Kroll, Phys. Rev. Lett. 20, 86 (1968)
Omitted endnote
Omitted endnote
R. Stroynowski et al., in High Energy Physics—1980, proceedings of the XXth International Conference, Madison, Wisconsin, edited by L. Durand and L. G. Pondrom (AIP, New York, 1981), p. 161
G. Abshire et al., in High Energy Physics—1980 ([6]), p. 158
J. Ballam et al., Phys. Rev. Lett. 41, 1207 (1978)
E. W. Beier et al., Phys. Rev. Lett. 37, 1117 (1976) S. Naito et al., submitted to INS Symposium on Particle Physics in the GeV Region, Tokyo, 1979 (unpublished)
J. H. Cobb et al., Phys. Lett. 78B, (1978) A. Chilingarov et al., Nucl. Phys. B151, 29 (1979)
J. Ballam et al., Phys. Rev. Lett. 40, 741 (1978)
J. R. Elliott et al., Phys. Rev. D 17, 83 (1978)
A. T. Goshaw et al., Phys. Rev. Lett. 43, 1065 (1979)
Omitted endnote

[c1] R. Ruckl, Phys. Lett. 64B, 39 (1976) N. S. Craigie and H. N. Thompson, Nucl. Phys. B141, 121 (1978) N. S. Craigie, Phys. Rep. 47, 1 (1978)

[c2] L. M. Lederman, Phys. Rep. 26C, 149 (1976) J. W. Cronin, in Proceedings of the International Symposium on Lepton and Photon Interactions at High Energies, Hamburg, 1977, edited by F. Gutbrod (DESY, Hamburg, 1977) L. M. Lederman, in Proceedings of the 19th International Conference on High Energy Physics, Tokyo, 1978, edited by S. Homma, M. Kawaguchi, and H. Miyazawa (Phys. Soc. of Japan, Tokyo, 1979) S. Mikamo, INS Symposium on Particle Physics in the GeV Region, Tokyo, 1979 (unpublished)

[c3] F. E. Low, Phys. Rev. 110, 974 (1958) T. H. Burnett and M. Kroll, Phys. Rev. Lett. 20, 86 (1968)

[c4] Omitted endnote

[c5] Omitted endnote

[c6] R. Stroynowski et al., in High Energy Physics—1980, proceedings of the XXth International Conference, Madison, Wisconsin, edited by L. Durand and L. G. Pondrom (AIP, New York, 1981), p. 161

[c7] G. Abshire et al., in High Energy Physics—1980 ([6]), p. 158

[c8] J. Ballam et al., Phys. Rev. Lett. 41, 1207 (1978)

[c9] E. W. Beier et al., Phys. Rev. Lett. 37, 1117 (1976) S. Naito et al., submitted to INS Symposium on Particle Physics in the GeV Region, Tokyo, 1979 (unpublished)

[c10] J. H. Cobb et al., Phys. Lett. 78B, (1978) A. Chilingarov et al., Nucl. Phys. B151, 29 (1979)

[c11] J. Ballam et al., Phys. Rev. Lett. 40, 741 (1978)

[c12] J. R. Elliott et al., Phys. Rev. D 17, 83 (1978)

[c13] A. T. Goshaw et al., Phys. Rev. Lett. 43, 1065 (1979)

[c14] Omitted endnote

Physical Review D

Export citation

Export citation

Measurement of direct electron-positron pair production from hadronic bremsstrahlung

Abstract

References (14)

Outline

Information

Filter

Filter

Article Lookup

Enter a citation