Charmonium pair production at the LHCb in the ICEM using the $k_T$-factorization: DPS versus SPS

Abstract

In the article, we study pair production of $\psi [1S]$ and $\psi [2S]$ charmonium states in the forward rapidity region of the LHCb experiment at the $\sqrt{s}=13$ TeV using the improved color evaporation model and the parton Reggeization approach, which is a gauge invariant version of the $k_T$-factorization approach. Taking into account single and double parton scattering mechanisms and using the set of model parameters which have been fixed early, we compare our theoretical predictions with the recent LHCb experimental data as well as with another theoretical predictions. The numerical calculations are performed using the parton--level Monte-Carlo event generator KaTie and modified KMRW model for unintegrated parton distribution functions. We have found absolutely dominant role of the double parton scattering mechanism in the charmonium pair production at the LHCb.

12 pages, 3 figures, 1 table

References in corpus (38)

• 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
• Transverse momentum dependent gluon density from DIS precision data
• Quarkonium Production in an Improved Color Evaporation Model
• Measurement of the prompt $J/\psi$ pair production cross-section in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Quasi-multi-Regge Processes with a Quark Exchange in the t-channel
• Charmonium Production at High Energy in the k_T-Factorization Approach
• Helicity amplitudes for high-energy scattering
• Production of J/psi+eta(c) vs. J/psi+J/psi at the LHC: Impact of Real alpha_s^5 corrections
• Observation and studies of double J/psi production at the Tevatron
• Dijet azimuthal decorrelations at the LHC in the parton Reggeization approach
• Observation and measurements of the production of prompt and non-prompt $J/\psi$ mesons in association with a $Z$ boson in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Scattering amplitudes with off-shell quarks
• Evidence for simultaneous production of $J/\psi$ and ${\rm Y}$ mesons
• TMDlib2 and TMDplotter: a platform for 3D hadron structure studies
• Production and polarization of prompt $J/\psi$ in the improved color evaporation model using the $k_T$-factorization approach
• Dynamical resolution scale in transverse momentum distributions 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
• Computing one-loop corrections to effective vertices with two scales in the EFT for Multi-Regge processes in QCD
• High-Energy Factorization for Drell-Yan process in $pp$ and $p\bar{p}$ collisions with new Unintegrated PDFs
• Double prompt $J/\psi$ hadroproduction in the parton Reggeization approach with high-energy resummation
• Single-parton scattering versus double-parton scattering in the production of two $c\bar{c}$ pairs and charmed meson correlations at the LHC
• Production of two charm quark-antiquark pairs in single-parton scattering within the $k_t$-factorization approach
• Production and polarization of direct $J/\psi$ to $\mathcal{O}({\alpha }_s^3)$ in the improved color evaporation model in collinear factorization
• $J/\psi$-meson production within improved color evaporation model with the $k_T$-factorization approach for $c\bar{c}$ production
• $\psi (2S)$ and ${\rm Y}(3S)$ hadroproduction in the parton Reggeization approach: Yield, polarization, and the role of fragmentation
• Production and polarization of prompt ${\rm Y}$($n$S) in the improved color evaporation model using the $k_T$-factorization approach
• Towards stability of NLO corrections in High-Energy Factorization via Modified Multi-Regge Kinematics approximation
• Single and pair $J/\psi$ production in the Improved Color Evaporation Model using the Parton Reggeization Approach
• Measurement of $J/\psi$-pair production in $pp$ collisions at $\sqrt{s}=13$ TeV and study of gluon transverse-momentum dependent PDFs
• Associated production of heavy quarkonium and $D-$meson in the improved color evaporation model with KaTie
• Pair production of heavy quarkonia in the color evaporation model
• Associated production of prompt $J/\psi$ and ${\rm Y}$ mesons in $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$
• Associated production of $J/\psi$ plus $Z(W)$ in the improved color evaporation model using the parton Reggeization approach
• Measurement of associated $J/\psi$-$\psi (2S)$ production cross-section in $pp$ collisions at $\sqrt{s}=13$ TeV