Associated production of $J/\psi$ and direct photon in the NRQCD and the ICEM using the high-energy factorization

Abstract

We study the associated $J/\psi$ and direct photon production in the high-energy factorization, as it is formulated in the parton Reggeization approach, using two different models for the hadronization of a heavy quark-antiquark pair into a heavy quarkonium, namely the non-relativistic quantum chromodynamics (NRQCD) and the improved color evaporation model (ICEM). We find essential differences in the predictions for cross-section and transverse momenta spectra obtained using the NRQCD and the ICEM, which can be used to discriminate between these models. Our prediction for cross-sections of the associated $J/\psi$ and direct photon production at the LHC energies slightly overestimates the results obtained early in the next-to-leading order (NLO) calculation in the collinear parton model (CPM). We predict different two-particle correlation spectra in the associated $J/\psi$ and direct photon production which may be of interest for experimental study.

arXiv comment10 pages, 3 figures

References in corpus (30)

• Generating Feynman Diagrams and Amplitudes with FeynArts 3
• Heavy quarkonium: progress, puzzles, and opportunities
• New Developments in FeynCalc 9.0
• FeynCalc 9.3: New features and improvements
• Unintegrated parton distributions
• High-Energy Factorization and Small-X Deep Inelastic Scattering Beyond Leading Order
• Gauge invariant effective action for high-energy processes in QCD
• Unintegrated parton distributions and inclusive jet production at HERA
• Quarkonium Production in an Improved Color Evaporation Model
• Accessing the Transverse Dynamics and Polarization of Gluons inside the Proton at the LHC
• Charmonium Production at High Energy in the k_T-Factorization Approach
• Dijet azimuthal decorrelations at the LHC in the parton Reggeization approach
• Next-to-leading-order tests of nonrelativistic-QCD factorization with $J/\psi$ yield and polarization
• Next-to-Leading-Order QCD corrections to J/ψ(Υ)+γproduction at the LHC
• $B\bar{B}$ angular correlations at the LHC in parton Reggeization approach merged with higher-order matrix elements
• Prompt J/psi production in the Regge limit of QCD: From Tevatron to LHC
• Associated Production of Heavy Quarkonia and Electroweak Bosons at Present and Future Colliders
• Matching factorization theorems with an inverse-error weighting
• High-Energy Factorization for Drell-Yan process in $pp$ and $p\bar{p}$ collisions with new Unintegrated PDFs
• Single jet and prompt-photon inclusive production with multi-Regge kinematics: From Tevatron to LHC
• Measurement of differential cross sections for inclusive isolated-photon and photon+jet production in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Diphoton production at Tevatron and the LHC in the NLO* approximation of the Parton Reggeization Approach
• Prompt photon photoproduction at HERA within the framework of the quark Reggeization hypothesis
• Testing Quarkonium Production with Photoproduced $J/\psi +\gamma$
• Measurement of the inclusive isolated photon production cross section in pp collisions at $\sqrt{s}$ = 7 TeV
• $\psi (2S)$ and ${\rm Y}(3S)$ hadroproduction in the parton Reggeization approach: Yield, polarization, and the role of fragmentation
• Next-to-Leading-Order study on the associate production of $J/\psi +\gamma$ at the LHC
• Associated $J/\psi +\gamma$ production as a probe of the polarized gluon distribution
• Single and pair $J/\psi$ production in the Improved Color Evaporation Model using the Parton Reggeization Approach
• Associated production of $J/\psi$ plus $Z(W)$ in the improved color evaporation model using the parton Reggeization approach

Cited by in corpus (1)

• Next-to-leading order analysis of $J/\psi +\gamma$ production in photon-photon collisions at CEPC