Drell-Yan process in the k_t-factorizations approach and its competition with semileptonic decays of heavy mesons

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• 作者：Gabriela Ś ; lipek ; Antoni Szczurek
• 刊名：Nuclear Physics B - Proceedings Supplements
• 出版年：2010
• 出版时间：January 2010
• 年：2010
• 卷：198
• 期：1
• 页码：63-66
• 全文大小：314 K

文摘

We discuss the main mechanisms for inclusive production of lepton pairs. Distributions of leptons in rapidity, azimuthal angle and transverse momentum are calculated in the k_t-factorization approach. In our calculations we include not only Fermi motion of hadron constituents but also the emission from the ladders. We use unintegrated parton distributions which fulfill Kwieciński evolution equations. We calculated both zeroth- and first-order contributions for pp collisions for different energies. These results are compared with experimental data. We have compared kinematic correlations between charged leptons for so-called “nonphotonic electrons” where electrons/positrons are obtained in semileptonic decays of heavy mesons (including c or b quark) and of charged leptons obtained in the Drell-Yan process.