Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-06-09
Phys.Rev.D80:074013,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages, 14 figs, A. Cisek is married name of A. Rybarska
Scientific paper
10.1103/PhysRevD.80.074013
We extend the k_\perp-factorization formalism for exclusive photoproduction of vector mesons to the production of electroweak Z^0 bosons. Predictions for the gamma p \to Z^0 p and p p \to p p Z^0 reactions are given using an unintegrated gluon distribution tested against deep inelastic data. We present distributions in the Z^0 rapidity, transverse momentum of Z^0 as well as in relative azimuthal angle between outgoing protons. The contributions of different flavours are discussed. Absorption effects lower the cross section by a factor of 1.5-2, depending on the Z-boson rapidity. We also discuss the production of Z^0 bosons in central inclusive production. Here rapidity and (x_{\Pom,1}, x_{\Pom,2}) distributions of Z^0 are calculated. The corresponding cross section is about three orders of magnitude larger than that for the purely exclusive process.
Cisek Anna
Schäfer Wolfgang
Szczurek Antoni
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