Energy Dependence of Intrinsic Charm Production: What is the Best Energy for Observation?

Abstract

Background: A nonperturbative charm production contribution, known as intrinsic charm, was predicted in the early 1980s. Recent results have provided new evidence for its existence but further confirmation is needed. Purpose: $J/\psi$ and $\bar{D}$ meson production are calculated with a combination of perturbative QCD and intrinsic charm to determine the best energy range to study intrinsic charm production. Methods: $J/\psi$ and $\bar{D}$ meson production are calculated in perturbative QCD to next-to-leading order in the cross section. Cold nuclear matter effects, including nuclear modification of the parton densities and $p_T$ broadening by multiple scattering are taken into account in the production of both; absorption by nucleons is also included for the $J/\psi$. Contributions from intrinsic charm are calculated assuming production from a $|uudc\bar{c}⟩$ Fock state. Results: The $J/\psi$ and $\bar{D}$ meson rapidity and $p_T$ distributions are calculated as a function of rapidity and transverse momentum $p_T$ over a wide range of center-of-mass energies with and without intrinsic charm in $p+p$ collisions. The nuclear modification factor, $R_{pA}$, is also calculated for $p+\mathrm{Pb}$ interactions at appropriate energies. Previous fixed-target data as a function of Feynman $x$, $x_F$, are also compared to calculations within the approach. Good agreement with the data is found when intrinsic charm is included. Conclusions: The intrinsic charm signal may be largest at midrapidity for future low energy fixed target experiments such as the proposed NA60+.

arXiv comment32 pages, 16 figures

References in corpus (62)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• New parton distributions for collider physics
• Heavy quarkonium: progress, puzzles, and opportunities
• Heavy Quark Symmetry
• Implications of CTEQ global analysis for collider observables
• The p_T Spectrum in Heavy-Flavour Hadroproduction
• EPPS16: Nuclear parton distributions with LHC data
• QCD Predictions for Charm and Bottom Production at RHIC
• Measurement of Differences Between J/Psi and Psi' Suppression in p-A Collisions
• Quarkonium production in hadronic collisions
• Heavy-quarkonium suppression in p-A collisions from parton energy loss in cold QCD matter
• Measurements of prompt charm production cross-sections in $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$
• Inclusive D^{*+-} Production in p p-bar Collisions with Massive Charm Quarks
• The Charm Parton Content of the Nucleon
• Reanalysis of the EMC charm production data with extrinsic and intrinsic charm at NLO
• A review of the intrinsic heavy quark content of the nucleon
• Quarkonium Production in an Improved Color Evaporation Model
• Narrowing the uncertainty on the total charm cross section and its effect on the J/ψ cross section
• Energy dependence of J/psi absorption in proton-nucleus collisions
• Nuclear modification of psi^prime, chi_c and J/psi production in d+Au collisions at sqrt(s_NN) = 200 GeV
• New limits on intrinsic charm in the nucleon from global analysis of parton distributions
• Open charm production at the LHC - $k_t$-factorization approach
• Study of prompt D${}^0$ meson production in pPb collisions at $\sqrt{s}$=5 TeV
• The $x_F$ Dependence of $\psi$ and Drell-Yan Production
• The A Dependence of Open Charm and Bottom Production
• J/psi suppression in p-A collisions from parton energy loss in cold QCD matter
• D-meson production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV and in pp collisions at $\sqrt{s}=7$ TeV
• J/$\psi$ production and nuclear effects in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Revisiting the D-meson hadroproduction in general-mass variable flavour number scheme
• Phenomenology of nonperturbative charm in the nucleon
• Where is the jet quenching in Pb+Pb collisions at 158 AGeV?
• Asymmetries between the production of D+ and D- mesons from 500 GeV/c pi- nucleon interactions as a function of xF and pt**2
• Intrinsic Charm Contribution to Double Quarkonium Hadroproduction
• First measurement of charm production in fixed-target configuration at the LHC
• Study of $J/\psi$ production and cold nuclear matter effects in $p$Pb collisions at $\sqrt{s_{NN}}=5\mathrm{TeV}$
• Kinematic distributions and nuclear effects of $J/\psi$ production in 920 GeV fixed-target proton-nucleus collisions
• Intrinsic Charm Parton Distribution Functions from CTEQ-TEA Global Analysis
• Charmed Hadron Asymmetries in the Intrinsic Charm Coalescence Model
• J/$\psi$ suppression at $\sqrt{\mathbf{s}}=$ 200 GeV in the comovers interaction model
• Measurement of prompt and nonprompt J/psi production in pp and pPb collisions at sqrt(s[NN]) = 5.02 TeV
• Predictions for Cold Nuclear Matter Effects in $p+$Pb Collisions at $\sqrt{s_{{}_{NN}}}=8.16$ TeV
• Production and polarization of prompt $J/\psi$ in the improved color evaporation model using the $k_T$-factorization approach
• Cold-nuclear-matter effects on heavy-quark production at forward and backward rapidity in d+Au collisions at sqrt(s_NN)=200 GeV
• Are the $J/\psi$ and ${\chi }_{c}A$ Dependencies the Same?
• Impact parameter dependence of the nuclear modification of J/psi production in d+Au collisions at sqrt(S_NN) = 200 GeV
• Virtual Meson Cloud of the Nucleon and Intrinsic Strangeness and Charm
• J/psi production in proton-nucleus collisions at 158 and 400 GeV
• Constraints on charm-anticharm asymmetry in the nucleon from lattice QCD
• A Kinematic Condition on Intrinsic Charm
• Measurement of differential $J/\psi$ production cross-sections and forward-backward ratio in p+Pb collisions with the ATLAS detector
• Predictions for $p+$Pb Collisions at $\sqrt{s_{NN}}=5$ TeV: Comparison with Data
• Study of $Z$ bosons produced in association with charm in the forward region
• Polarization of prompt $J/\psi$ and ${\rm Y}$(1S) production in the color evaporation model
• Leading Charm in Hadron-Nucleus Interactions in the Intrinsic Charm Model
• Production and polarization of direct $J/\psi$ to $\mathcal{O}({\alpha }_s^3)$ in the improved color evaporation model in collinear factorization
• Heavy Flavor Azimuthal Correlations in Cold Nuclear Matter
• Polarized Heavy Quarkonium Production in the Color Evaporation Model
• Production and polarization of prompt ${\rm Y}$($n$S) in the improved color evaporation model using the $k_T$-factorization approach
• Limits on Intrinsic Charm Production from the SeaQuest Experiment
• Measurement of the J/Psi Production Cross Section in 920 GeV/c Fixed-Target Proton-Nucleus Interactions
• $\mathrm{J}/\psi$ production at low transverse momentum in p+p and d+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• $b\bar{b}$ Kinematic Correlations in Cold Nuclear Matter

Cited by in corpus (2)

• The Present and Future of QCD
• Contribution from Intrinsic Charm Production to Fixed-Target Interactions at the LHC