M. A. Malyshev

Prompt photon and associated heavy quark production at hadron colliders with kT -factorization

A bstractIn the framework of the kT -factorization approach, the production of prompt photons in association with a heavy (charm or beauty) quarks at high energies is studied. The consideration is based on the

Phenomenology of kT-factorization for inclusive Higgs boson production at LHC

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Testing for kt-factorization with inclusive prompt photon production at LHC

off-shell amplitudes of gluon-gluon fusion and quark-(anti)quark interaction subprocesses. The unintegrated parton densities in a proton are determined using the Kimber-Martin-Ryskin prescription. The analysis covers the total and differential cross sections and extends to specific angular correlations between the produced prompt photons and muons originating from the semileptonic decays of associated heavy quarks. Theoretical uncertainties of our evaluations are studied and comparison with the results of standard NLO pQCD calculations is performed. Our numerical predictions are compared with the recent experimental data taken by the D∅ and CDF collaborations at the Tevatron. Finally, we extend our results to LHC energies.

Drell-Yan lepton pair production at high energies in the k T -factorization approach

Abstract We investigate the inclusive Higgs boson production in proton–proton collisions at high energies in the framework of k T -factorization QCD approach. The attention is focused on the dominant off-shell gluon–gluon fusion subprocess g ⁎ g ⁎ → H → γ γ , where the transverse momentum of incoming gluons are taken into account. The transverse momentum dependent (or unintegrated) gluon densities of the proton are determined using the CCFM evolution equation as well as the Kimber–Martin–Ryskin prescription. We study the theoretical uncertainties of our calculations and perform the comparison with the results of traditional pQCD evaluations. Our predictions agree well with the first experimental data taken by the ATLAS Collaboration at the LHC. We argue that further studies of the Higgs boson production are capable of constraining the unintegrated gluon densities of the proton.

Associated W±D(⁎) production at the LHC and prospects to observe double parton interactions

Abstract We study the possibility to analyse the data on inclusive prompt photon production at first LHC runs in the framework of the k T -factorization QCD approach. Our consideration is based on the amplitude for the production of a single photon associated with a quark pair in the fusion of two off-shell gluons. The quark component is taken into account separately using the quark–gluon Compton scattering and quark–antiquark annihilation QCD subprocesses. The unintegrated parton densities in a proton are determined using the Kimber–Martin–Ryskin (KMR) prescription as well as the CCFM evolution equation.

Reconsideration of the inclusive prompt photon production at the LHC with k T -factorization

A bstractIn the framework of the kT -factorization approach, the production of unpolar-ized Drell-Yan lepton pairs at high energies is studied. The consideration is based on the

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 the prospects to observe double parton interactions

(α) and

Inclusive Higgs boson production at the LHC in the kt-factorization approach

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Testing the parton evolution with the use of two-body final states

(ααs) off-shell partonic matrix elements with virtual photon γ∗ and Z boson exchange. The calculations include leptonic decays of Z bosons with full spin correlations as well as γ∗−Z interference. The unintegrated parton densities in a proton are determined by the Kimber-Martin-Ryskin prescription. Our numerical predictions are compared with the data taken by the D∅, CDF and CMS collaborations at the Tevatron and LHC energies. Special attention is put on the specific angular distributions measured very recently by the CDF collaboration for the first time.