Direct-photon plus away-side jet production inpp collisions at\(\sqrt s = 63\) GeV and a determination of the gluon distribution

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

European Physical Journal C（1987）

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摘要

We have determined the double inclusive cross-section for opposite-side high-p T photons and away-side jets withθ γ ≈θjet≈90° produced inpp collisions at the CERN Intersecting Storage Rings at\(\sqrt s = 63\) 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.

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