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ISSN - 01709739, Zeitschrift f�r Physik C-Particles and Fields, 1987, vol. 34, p. 293-302

Direct-photon plus away-side jet production in pp collisions at {Mathematical expression} GeV and a determination of the gluon distribution

Åkesson T., Albrow M. G., Almehed S., Anassontzis E., Batley R., Benary O., Bøggild H., Botner O., Breuker H., Burkert V., Callen B., Carosi R., Carter A. A., Carter J. R., Cecil P. C., Chernyatin V., Choi Y., Cleland W. E., Dagan S., Dahl-Jensen E., Dahl-Jensen I., Dam P., Damgaard G., Dolgoshein B., Eidelman S., Evans M. W., Fabjan C. W., Gavrilenko I., Goerlach U., Goloubkov Y., Gordon H., Hansen K. H., Hedberg V., Hiddleston J. W., Ioannou P., Jarlskog G., Jensen T., Kalinovsky A., Kantserov V., Katsanevas S., Kourkoumelis C., Kroeger R., Kulka K., Lissauer D., Lörstad B., Mannelli I., Markou A., Mayburov S., McCubbin N. A., Mjörnmark U., Møller R., Molzon W., Nevsky P., Nielsen B. S., Olsen L. H., Oren Y., Piskounov G., Rahm D. C., Resvanis L. K., Rudge A., Schukraft J., Shmeleva A., Sidorov V., Smirnov S., Specht H., Starinsky N., Stumer I., Sullivan M., Thodberg H. H., Thompson J. A., Thorstenson G., Vanjashin A., Vella E., Williamson J., Willis W. J., Winik M., Woody C.

We have determined the double inclusive cross-section for opposite-side high-pT photons and away-side jets with θγ≈θjet≈90° produced in pp collisions at the CERN Intersecting Storage Rings at {Mathematical expression} GeV. Under the assumption that these events arise predominantly from the QCD gluon Compton process we have calculated the gluon structure function in the range 0.15≦x≦0.30 at an average square of the four-momentum transfer of 40 GeV2/c2. The data favour a soft gluon distribution in the proton. © 1987 Springer-Verlag.