Inclusive production of direct photons in 200-GeV/c collisions

M. McLaughlin, J. Biel, C. Bromberg, B. Brown, C. Chandlee, S. Cihangir, S. R.W. Cooper, T. Ferbel, D. Garelick, G. Glass, M. Glaubman, S. R. Han, K. Heller, S. Hossain, J. Huston, A. Jonckheere, J. Lebritton, R. A. Lewis, F. Lobkowicz, M. MarshakC. A. Nelson, E. Peterson, E. Pothier, J. Povlis, K. Ruddick, M. Shupe, P. Slattery, G. A. Smith

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43 Scopus citations

Abstract

The authors have measured the inclusive production of direct photons in the transverse momentum (pT) range 2.1-5.0 GeV/c in 200-GeV/c collisions of protons and π+ mesons on a carbon target. A significant yield of direct photons was observed for pT>2.5 GeV/c. The invariant cross section for direct-photon production, when compared with measurements from the CERN intersecting storage rings, can be expressed in terms of pT and xT=2pTsas(42±14)(1-xT)8. 1±1.0pT-6.6±0.3 μb/GeV2 for the c.m. energy range from s=19.4 to 63 GeV, and for the xT range from 0.2 to 0.5.

Original languageEnglish (US)
Pages (from-to)971-974
Number of pages4
JournalPhysical review letters
Volume51
Issue number11
DOIs
StatePublished - Jan 1 1983

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    McLaughlin, M., Biel, J., Bromberg, C., Brown, B., Chandlee, C., Cihangir, S., Cooper, S. R. W., Ferbel, T., Garelick, D., Glass, G., Glaubman, M., Han, S. R., Heller, K., Hossain, S., Huston, J., Jonckheere, A., Lebritton, J., Lewis, R. A., Lobkowicz, F., ... Smith, G. A. (1983). Inclusive production of direct photons in 200-GeV/c collisions. Physical review letters, 51(11), 971-974. https://doi.org/10.1103/PhysRevLett.51.971