Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-08-11
Phys.Rev.D78:114007,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, 18 figures, slightly modified, a comment to b-space resummation added
Scientific paper
10.1103/PhysRevD.78.114007
The differential cross section for the dilepton production is calculated including Fermi motion of hadron constituents as well as emission from the ladders in the formalism of unintegrated parton distributions. We use unintegrated parton distributions which fulfil Kwieci\'nski evolution equations. Both zeroth- and first-order (for matrix element) contributions are included. We calculate azimuthal angular correlations between charged leptons and deviations from the $p_t(l^+) = p_t(l^-)$ relation. We concentrate on the distribution in dilepton-pair transverse momentum. We find incident energy and virtuality dependence of the distribution in transverse momentum of the lepton pair. We study also azimuthal correlations between jet and dilepton pair and correlation in the $(p_{1t}(jet),p_{2t}(l^+ l^-))$ space. The results are compared with experimental data of the R209 and UA1 collaborations.
Slipek Gabriela
Szczurek Antoni
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