Prompt-photon plus jet associated photoproduction at HERA in the parton Reggeization approach

Abstract

We study the photoproduction of isolated prompt photons associated with hadron jets in the framework of the parton Reggeization approach. The cross section distributions in the transverse energies and pseudorapidities of the prompt photon and the jet as well as the azimuthal decorrelation variables measured by the H1 and ZEUS collaborations at DESY HERA are nicely described by our predictions. The main improvements with respect to previous studies in the $k_T$-factorization framework include the application of the Reggeized-quark formalism, the generation of exactly gauge-invariant amplitudes with off-shell initial-state quarks, and the exact treatment of the $\gamma R\to \gamma g$ box contribution with off-shell initial-state gluons.

arXiv comment35 pages, 15 figures, 1 table, matches journal version

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Cited by in corpus (15)

• $B\bar{B}$ angular correlations at the LHC in parton Reggeization approach merged with higher-order matrix elements
• On the one-loop calculations with Reggeized quarks
• Double prompt $J/\psi$ hadroproduction in the parton Reggeization approach with high-energy resummation
• Diphoton production at Tevatron and the LHC in the NLO* approximation of the Parton Reggeization Approach
• $\psi (2S)$ and ${\rm Y}(3S)$ hadroproduction in the parton Reggeization approach: Yield, polarization, and the role of fragmentation
• B-meson production in the Parton Reggeization Approach at Tevatron and the LHC
• Large-p_T production of D mesons at the LHCb in the parton Reggeization approach
• A new phenomenological Investigation of $KMR$ and $MRW$ $unintegrated$ parton distribution functions
• Open charm production in the parton Reggeization approach: from Tevatron to LHC
• TMD parton showers for associated $\gamma$+jet production in electron-proton collisions at high energies
• Towards NLO calculations in the parton Reggeization approach
• Angular decorrelations in $\gamma +2jet$ events at high energies in the parton Reggeization approach
• Single isolated photon production in the NLO${}^{\star }$ approximation of the Parton Reggeization Approach
• QCD amplitudes with 2 initial spacelike legs via generalised BCFW recursion
• Prompt-photon plus jet photoproduction with ZEUS at DESY HERA in the parton Reggeization approach