$J/\psi$ meson production in association with an open charm hadron at the LHC: A reappraisal

Abstract

We critically (re)examine the associated production process of a $J/\psi$ meson plus an open charm hadron at the LHC in the proton-proton ($pp$) and proton-lead ($p\mathrm{Pb}$) collisions. Such a process is very intriguing in the sense of tailoring to explore the double parton structure of nucleons and to determine the geometry of partons in nuclei. In order to interpret the existing $pp$ data with the LHCb detector at the center-of-mass energy $\sqrt{s}=7$ TeV, we introduce two overlooked mechanisms for the double parton scattering (DPS) and single parton scattering (SPS) processes. Besides the conventional DPS mode, where the two mesons are produced almost independently in the two separate scattering subprocesses, we propose a novel DPS mechanism that the two constituent (heavy) quarks stemming from two hard scatterings can form into a composite particle, like the $J/\psi$ meson, during the hadronization phase. However, it turns out the corresponding contribution is small in $J/\psi +c\bar{c}$ hadroproduction. On the contrary, we point out that the resummation of the initial state logarithms due to gluon splitting into a charm quark pair is crucial to understand the LHCb measurement, which was overlooked in the literature. We perform a proper matching between the perturbative calculations in different initial-quark flavor number schemes, generically referring to the variable flavor number scheme. The new variable flavor number scheme calculation for the process strongly enhance the SPS cross sections, almost closing the discrepancies between theory and experiment. Finally, we present our predictions for the forthcoming LHCb measurement in $p\mathrm{Pb}$ collisions at $\sqrt{s_{NN}}=8.16$ TeV. Some interesting observables are exploited to set up the control regions of the DPS signal and to probe the impact-parameter dependent parton densities in lead.

arXiv comment32 pages, 20 figures, 7 tables; v2: match to journal version (add a new figure and a few references, fix a few typos)

References in corpus (63)

• An Introduction to PYTHIA 8.2
• A Brief Introduction to PYTHIA 8.1
• Asymptotic formulae for likelihood-based tests of new physics
• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• New parton distributions for collider physics
• Parton distributions from high-precision collider data
• New parton distribution functions from a global analysis of quantum chromodynamics
• Parton distributions in the LHC era: MMHT 2014 PDFs
• The p_T Spectrum in Heavy-Flavour Hadroproduction
• EPPS16: Nuclear parton distributions with LHC data
• Leptoproduction of Heavy Quarks II -- A Unified QCD Formulation of Charged and Neutral Current Processes from Fixed-target to Collider Energies
• Measurement of J/psi production in pp collisions at sqrt(s)=7 TeV
• Heavy quarks in deep-inelastic scattering
• Charm electroproduction viewed in the variable-flavour number scheme versus fixed-order perturbation theory
• Towards an automated tool to evaluate the impact of the nuclear modification of the gluon density on quarkonium, D and B meson production in proton-nucleus collisions
• An Ordered Analysis of Heavy Flavour Production in Deep Inelastic Scattering
• Quarkonium Production at High-Energy Colliders
• World data of J/psi production consolidate NRQCD factorization at NLO
• Polarization for Prompt J/psi, psi(2s) production at the Tevatron and LHC
• Polarization of Prompt J/psi at the Tevatron
• A Variable-Flavour Number Scheme for NNLO
• Treatment of Heavy Quarks in Deeply Inelastic Scattering
• Open Heavy Flavor Production in QCD -- Conceptual Framework and Implementation Issues
• Prompt charm production in pp collisions at sqrt(s)=7 TeV
• Charmed Hadrons from Coalescence plus Fragmentation in relativistic nucleus-nucleus collisions at RHIC and LHC
• Fragmentation contributions to J/psi production at the Tevatron and the LHC
• Observation of double charm production involving open charm in pp collisions at $\sqrt{s}$=7 TeV
• HELAC-Onia: an automatic matrix element generator for heavy quarkonium physics
• b-Initiated processes at the LHC: a reappraisal
• Gluon Shadowing in Heavy-Flavor Production at the LHC
• High transverse momentum quarkonium production and dissociation in heavy ion collisions
• Pair production of J/psi as a probe of double parton scattering at LHCb
• Hadroproduction of J/psi and Upsilon in association with a heavy-quark pair
• J/psi-Pair Production at Large Momenta: Indications for Double-Parton Scatterings and Large alpha_s^5 Contributions
• Doubly Charmed Baryon Production in Hadronic Experiments
• ${\eta }_c$ production at LHC and indications on the understanding of $J/\psi$ production
• Higgs production in bottom-quark fusion in a matched scheme
• Heavy-Quarkonium Production in High Energy Proton-Proton Collisions at RHIC
• Production of J/psi and Upsilon mesons in pp collisions at sqrt(s) = 8 TeV
• ${\Lambda }_{\mathrm{c}}^{+}$ production in pp collisions at $\sqrt{s}=7$ TeV and in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Higgs production in bottom-quark fusion: matching beyond leading order
• Heavy Quarkonium Production at Low Pt in NRQCD with Soft Gluon Resummation
• Measuring Double Parton Distributions in Nucleons at Proton-Nucleus Colliders
• Predictions for Cold Nuclear Matter Effects in $p+$Pb Collisions at $\sqrt{s_{{}_{NN}}}=8.16$ TeV
• Double-quarkonium production at a fixed-target experiment at the LHC (AFTER@LHC)
• Heavy Quark Hadroproduction in Perturbative QCD
• Color Transfer in Associated Heavy-Quarkonium Production
• Associated production of a quarkonium and a Z boson at one loop in a quark-hadron-duality approach
• Complete Study of Hadroproduction of a ${\rm Y}$ Meson Associated with a Prompt $J/\psi$
• Towards a fully massive five-flavour scheme
• Automated simulations beyond the Standard Model: supersymmetry
• Indication for Double Parton Scatterings in W + Prompt J/Psi Production at the LHC
• Determination of the strong coupling constant ${\alpha }_s(m_Z)$ from measurements of the total cross section for top-antitop quark production
• Triple prompt $J/\psi$ hadroproduction as a hard probe of multiple-parton scatterings
• Color Transfer Enhancement for Heavy Quarkonium Production
• Polarized double-virtual amplitudes for heavy-quark pair production
• Heavy Quark Production in the ACOT Scheme at NNLO and N3LO
• ${\chi }_{cJ}$ production associated with a $c\bar{c}$ pair at hadron colliders
• Double D-meson production in proton-proton and proton-lead collisions at the LHC
• A Hybrid Scheme for Heavy Flavors: Merging the FFNS and VFNS
• $Z$ boson production in bottom-quark fusion: a study of $b$-mass effects beyond leading order
• Probing impact-parameter dependent nuclear parton densities from double parton scatterings in heavy-ion collisions
• Boosting perturbative QCD stability in quarkonium production

Cited by in corpus (10)

• Large-P_T inclusive photoproduction of J/psi in electron-proton collisions at HERA and the EIC
• Reweighted nuclear PDFs using Heavy-Flavor Production Data at the LHC: nCTEQ15_rwHF & EPPS16_rwHF
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• Observation of enhanced double parton scattering in proton-lead collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV
• Prospects for quarkonium studies at the high-luminosity LHC
• 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
• Associated production of prompt $J/\psi$ and ${\rm Y}$ mesons in $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$
• FKS subtraction for quarkonium production at NLO
• Automated event generation for S-wave quarkonium and leptonium production in NRQCD and NRQED