Comparison of direct {gamma} production in {bar p}p and pp reactions and determination of {Lambda}(4)/MS and the gluon structure function
Journal Article
·
· Physics of Atomic Nuclei
OSTI ID:50576
- CERN, Geneva (Switzerland)
- Universite de Lausanne (Switzerland); and others
Direct photons were studied in both {bar p}p and pp interactions at {radical}s = 24.3 GeV in the transverse momentum range 4.1 - 6.1 GeV/c (0.34 < x{sub T} < 0.5) for the rapidity range {minus}0.2 - 1.0. The experiment was performed using an internal hydrogen jet target in the CERN Sp{bar p}S collider. Preliminary cross sections in {bar p}p and pp are presented. The cross-section difference {sigma} ({bar p}p {yields} {gamma}X) - {sigma}(pp {yields} {gamma}X) has been measured and is compared to theoretical predictions. A preliminary determination of {Lambda}(4)/MS and of the gluon structure function is obtained.
- OSTI ID:
- 50576
- Report Number(s):
- CONF-9309360--
- Journal Information:
- Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 9 Vol. 57; ISSN 1063-7788; ISSN PANUEO
- Country of Publication:
- United States
- Language:
- English
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