$J/\psi$ polarization in high multiplicity $pp$ and $pA$ collisions: CGC+NRQCD approach

Abstract

Quarkonium production mechanism in high multiplicity small collision systems has recently been pursued in the color-glass-condensate (CGC) effective theory combined with non-relativistic QCD (NRQCD) factorization, allowing to study initial state interactions. Quarkonium polarization, potentially measured in future experiments, would help elucidate the quarkonium production mechanism at high multiplicities. In this paper, we provide predictions on $J/\psi$ polarization parameters in high multiplicity proton-proton ($pp$) and proton-nucleus ($pA$) collisions within the CGC+NRQCD framework. Theoretical predictions are given for $J/\psi$ rapidity $2.5<y_{J/\psi }<4$, charged-particle multiplicity pseudorapidity $|{\eta }_{ch}|<1$ and energies $\sqrt{S}=13\mathrm{TeV}$ for $pp$, $\sqrt{S}=8.16\mathrm{TeV}$ for $pA$ collisions. Considering two leptonic frame choices (Collins - Soper and helicity) we find a weak polarization of $J/\psi$ that additionally decreases with growing event activities. No significant system size dependence between $pp$ and $pA$ collisions is obtained - this could be a new constraint to initial state interactions in small collision systems.

arXiv comment9 pages, 1 figure

References in corpus (80)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Computing Quark and Gluon Distribution Functions for Very Large Nuclei
• Heavy quarkonium: progress, puzzles, and opportunities
• Operator expansion for high-energy scattering
• Gluon Distribution Functions for Very Large Nuclei at Small Transverse Momentum
• Small-x F_2 Structure Function of a Nucleus Including Multiple Pomeron Exchanges
• Nonlinear Gluon Evolution in the Color Glass Condensate: I
• The Color Glass Condensate
• The Wilson renormalization group for low x physics: towards the high density regime
• Nonlinear Gluon Evolution in the Color Glass Condensate: II
• The Wilson renormalization group for low x physics: Gluon evolution at finite parton density
• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• Fragmentation Functions for Pions, Kaons, and Protons at Next-to-Leading Order
• Quarkonium Wave Functions at the Origin
• Evolution at small x_bj: The Color Glass Condensate
• Quark contribution to the small-$x$ evolution of color dipole
• J/psi polarization at hadron colliders in nonrelativistic QCD
• AAMQS: A non-linear QCD analysis of new HERA data at small-x including heavy quarks
• Comparison of the Color Glass Condensate to di-hadron correlations in proton-proton and proton-nucleus collisions
• Small System Collectivity in Relativistic Hadron and Nuclear Collisions
• Inclusive Gluon Production in DIS at High Parton Density
• High energy pA collisions in the color glass condensate approach II. Quark production
• Novel Collective Phenomena in High-Energy Proton-Proton and Proton-Nucleus Collisions
• Gluon saturation and initial conditions for relativistic heavy ion collisions
• The initial gluon multiplicity in heavy ion collisions
• J/psi polarization at Tevatron and LHC: Nonrelativistic-QCD factorization at the crossroads
• High energy pA collisions in the color glass condensate approach I. Gluon production and the Cronin effect
• World data of J/psi production consolidate NRQCD factorization at NLO
• Polarization for Prompt J/psi, psi(2s) production at the Tevatron and LHC
• Analysing radial flow features in p-Pb and p-p collisions at several TeV by studying identified particle production in EPOS3
• Non-linear QCD meets data: A global analysis of lepton-proton scattering with running coupling BK evolution
• Measurement of J/Psi and Psi(2S) Polarization in ppbar Collisions at sqrt(s) = 1.8 TeV
• Polarizations of J/psi and psi(2S) Mesons Produced in ppbar Collisions at 1.96 TeV
• Polarization of Prompt J/psi at the Tevatron
• CGC predictions for p+Pb collisions at the LHC
• Fragmentation contributions to J/psi production at the Tevatron and the LHC
• How Protons Shatter Colored Glass
• Long range two-particle rapidity correlations in A+A collisions from high energy QCD evolution
• Comprehensive description of $J/\psi$ production in proton-proton collisions at collider energies
• Measurement of the prompt J/psi and psi(2S) polarizations in pp collisions at sqrt(s) = 7 TeV
• Measurement of $J/\psi$ polarization in $pp$ collisions at $\sqrt{s}=7$ TeV
• J/$\psi$ polarization in pp collisions at $\sqrt{s}=7$ TeV
• New Observables in Inclusive Production of Quarkonia
• Heavy quark pair production in high energy pA collisions: Quarkonium
• J/psi Production as a Function of Charged Particle Multiplicity in pp Collisions at sqrt{s} = 7 TeV
• Quark pair production in high energy pA collisions: General features
• Quarkonium Production in an Improved Color Evaporation Model
• Mass ordering of spectra from fragmentation of saturated gluon states in high multiplicity proton-proton collisions
• Inelastic photoproduction of polarised $J/\psi$
• QCD radiative correction to color-octet $J/\psi$ inclusive production at B Factories
• Large mass Q-Qbar production from the Color Glass Condensate
• Event activity dependence of Y(nS) production in sqrt(s[NN]) = 5.02 TeV pPb and sqrt(s) = 2.76 TeV pp collisions
• $J/\psi$ production and suppression in high energy proton-nucleus collisions
• High multiplicity pp events and J/ψ production at LHC
• Measurement of charm and beauty production at central rapidity versus charged-particle multiplicity in proton-proton collisions at $\sqrt{\text{s}}=7$ TeV
• Transverse momentum dependence of J/psi polarization at midrapidity in p+p collisions at sqrt(s)=200 GeV
• Fragmentation contributions to hadroproduction of prompt $J/\psi$, ${\chi }_{cJ}$, and $\psi (2S)$ states
• High Gluon Densities in Heavy Ions Collisions
• Generalized scaling of the transverse mass spectrum at the Relativistic Heavy-Ion Collider
• Quarkonium production in high energy proton-nucleus collisions: CGC meets NRQCD
• Production and polarization of prompt $J/\psi$ in the improved color evaporation model using the $k_T$-factorization approach
• Interplay of the CGC and TMD frameworks to all orders in kinematic twist
• Multiplicity dependence of J/$\psi$ production at midrapidity in pp collisions at $\sqrt{s}$ = 13 TeV
• Event engineering studies for heavy flavor production and hadronization in high multiplicity hadron-hadron and hadron-nucleus collisions
• $\psi (2S)$ versus $J/\psi$ suppression in proton-nucleus collisions from factorization violating soft color exchanges
• Elucidating the multiplicity dependence of J/$\psi$ production in proton-proton collisions with PYTHIA8
• $J/\psi$ polarization in the CGC+NRQCD approach
• Energy dependence of the ridge in high multiplicity proton-proton collisions
• Measurement of the inclusive J/$\psi$ polarization at forward rapidity in pp collisions at $\sqrt{s}=8$ TeV
• Comparison of improved TMD and CGC frameworks in forward quark dijet production
• Universal Suppression of Heavy Quarkonium Production in pA Collisions at Low Transverse Momentum
• $J/\psi$-meson production within improved color evaporation model with the $k_T$-factorization approach for $c\bar{c}$ production
• Linear vs non-linear QCD evolution: from HERA data to LHC phenomenology
• Forward Heavy Quarkonium Productions at the LHC
• Heavy quarkonium in saturated environment of high-multiplicity pp collisions
• Leptons from heavy-quark semileptonic decay in pA collisions within the CGC framework
• Measurement of inclusive J/$\psi$ polarization in p+p collisions at $\sqrt{s}$ = 200 GeV by the STAR experiment
• J/$\psi$ production as a function of charged-particle multiplicity in p-Pb collisions at $\sqrt{{\text{s}}_{\mathrm{NN}}}=8.16$ TeV
• High energy QCD: multiplicity dependence of quarkonia production
• $J/\psi$ polarization in p+p collisions at $\sqrt{s}$ = 200 GeV in STAR

Cited by in corpus (11)

• Spin alignment of vector mesons by second-order hydrodynamic gradients
• Vector quarkonia at the LHC with JETHAD: A high-energy viewpoint
• Exotic tetraquarks at the HL-LHC with JETHAD: A high-energy viewpoint
• Quarkonium polarization in Pb+Pb collisions in the improved color evaporation model
• Pseudoscalar heavy-quarkonium hadroproduction from nonrelativistic fragmentation at NLL/NLO${}^{+}$
• Quarkonium Polarization in Medium from Open Quantum Systems and Chromomagnetic Correlators
• Triply Heavy $\Omega$ Baryons with JETHAD: A High-Energy Viewpoint
• Isolated photon production in $pp$ collisions at forward rapidities and high multiplicity events
• $J/\psi$ and $\psi$(2S) polarization in proton-proton collisions at energies available at the CERN Large Hadron Collider using PYTHIA8
• Tetraquark-Jet Systems at the High-Luminosity LHC
• Kaon production in high multiplicity events at the LHC