Production of real photons at large transverse momentum incollisions
- 1 October 1978
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 18 (7), 2469-2483
- https://doi.org/10.1103/physrevd.18.2469
Abstract
The production of photons at large transverse momentum can be used as a direct probe of quark and gluon subprocesses at short distances. We calculate the cross section for high- photons produced in collisions from lowest-order quantum-chromodynamics (QCD) and higher-order constituent-interchange-model (CIM) processes. We find that CIM terms dominate both and spectra until very high -although there are regions of and where the CIM contributions dominate the spectrum but the spectrum already shows the scaling behavior of lowest-order QCD, and also vice versa. We emphasize that in some processes (e.g., gluon + quark → photon + quark), the photon is produced without accompanying toward-side hadrons.
Keywords
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