Production of electroweak gauge bosons in off-shell gluon-gluon fusion

Abstract

We study the production of electroweak gauge bosons at high energies in the framework of kt-factorization QCD approach. Contributions from the valence quarks are calculated using the quark-gluon interaction and quark-antiquark annihilation QCD subprocesses. The total and differential cross sections (as a function of the transverse momentum and rapidity) are presented and the ratio of cross sections for W and Z boson production is investigated. The conservative error analysis is performed. In the numerical calculations two different sets of unintegrated gluon distributions in the proton are used: the one obtained from Ciafaloni-Catani-Fiorani-Marchesini evolution equation and the other from Kimber-Martin-Ryskin prescription. Theoretical results are compared with experimental data taken by the D0 and CDF collaborations at the Tevatron. We demonstrate the importance of the quark component in parton evolution in description of the experimental data. This component is very significant also at the LHC energies.

arXiv comment33 pages, 18 figures

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• $KMR$ $k_t$-factorization procedure for the description of the $LHCb$ forward hadron-hadron $Z^0$ production at $\sqrt{s}=13TeV$
• Associated production of $Z$ bosons and $b$-jets at the LHC in the combined $k_T$ + collinear QCD factorization approach
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• Associated production of electroweak bosons and heavy mesons at LHCb and prospects to observe double parton interactions
• On the quark component in prompt photon and electroweak gauge boson production at high energies
• Prediction for unintegrated parton distributions
• $k_t$-factorization vs collinear factorization in $W^{+}{W}^{-}$ pair production at the LHC
• Drell-Yan production with the CCFM-K evolution
• Electroweak Radiative Corrections in Precision LHC Measurements of $W^{\pm }/Z^0$+jets
• Inclusive gauge boson production in the color dipole formalism
• Discriminating the heavy jet production mechanisms in associated $Z$ + heavy flavor events at the LHC
• On the possibility to detect the Higgs decay $H\to b\bar{b}$ in the associated $Z+b\bar{b}$ production at the LHC
• Probing the proton structure with associated vector boson and heavy flavor jet production at the LHC