Testing Charmonium Production Mechanism via Polarized $J/\psi$ Pair Production at the LHC

Abstract

At present the color-octet mechanism is still an important and debatable part in the non-relativistic QCD(NRQCD). We find in this work that the polarized double charmonium production at the LHC may pose a stringent test on the charmonium production mechanism. Result shows that the transverse momentum($p_T$) scaling behaviors of double $J/\psi$ differential cross sections in color-singlet and -octet production mechanisms deviate distinctively from each other while $p_T$ is larger than 7 GeV. In color-octet mechanism, the two $J/\psi$s in one pair are mostly transversely polarized when $p_T\gg 2m_c$, as expected from the fragmentation limit point of view. In color-singlet mechanism, there is about one half of the charmonium pairs with at least one $J/\psi$ being longitudinally polarized at moderate transverse momentum. The energy dependence of the polarized $J/\psi$ pair production is found to be weak, and this process is found to be experimentally attainable in the early phase of the LHC operation.

16 pages, 5 figures

References in corpus (15)

• QCD corrections to J/psi and Upsilon production at hadron colliders
• Exclusive Double-Charmonium Production from e^+ e^- Annihilation into a Virtual Photon
• Measurement of Double Charmonium Production in $e^{+}{e}^{-}$ Annihilations at $\sqrt{s}=10.6$ GeV
• J/psi, psi' and Upsilon Production at Hadron Colliders: a review
• Next-to-Leading Order QCD Correction to ${\mathbf{e}}^{+}{\mathbf{e}}^{-}\to \mathbf{J}/\mathbf{\psi }+{\mathbf{\eta }}_{\mathbf{c}}$ at $\sqrt{s}=10.6$GeV}
• QCD corrections to J/psi polarization of hadronproduction at Tevatron and LHC
• Problems of Double Charm Production in $e^{+}{e}^{-}$ Annihilation at $\sqrt{s}=10.6$ GeV
• Study of double charmonium production in e^+ e^- annihilation at \sqrt{s} ~ 10.6 GeV
• Hadroproduction of J/psi and Upsilon in association with a heavy-quark pair
• Exclusive J/ψProductions at e^+ e^- Colliders
• QCD corrections to J/psi plus eta_c production in e+e- annihilation at sqrt{s}=10.6 GeV
• Potential-model calculation of an order-v^2 NRQCD matrix element
• Reconciling the light-cone and nonrelativistic QCD approaches to calculating e+ e- -> J/psi + eta_c
• QCD corrections to polarization of J/ψand Υat Fermilab Tevatron and CERN LHC
• Factorization and NLO QCD correction in e^+ e^- \to J/ψ(ψ(2S))+ χ_{c0} at B Factories}

Cited by in corpus (42)

• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• Observation of $J/\psi$ pair production in pp collisions at $\sqrt{s}=7TeV$
• New Observables in Inclusive Production of Quarkonia
• Double J/psi-meson Production at LHC and 4c-tetraquark state
• New structures in the J/$\psi$J/$\psi$ mass spectrum in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• J/psi-Pair Production at Large Momenta: Indications for Double-Parton Scatterings and Large alpha_s^5 Contributions
• Observation of an excess of di-charmonium events in the four-muon final state with the ATLAS detector
• Measurement of prompt J/psi pair production in pp collisions at sqrt(s) = 7 TeV
• Production of J/psi+eta(c) vs. J/psi+J/psi at the LHC: Impact of Real alpha_s^5 corrections
• Measurement of the $J/\psi$ pair production cross-section in $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$
• Impact of $J/\psi$ pair production at the LHC and predictions in nonrelativistic QCD
• Pinning down the linearly-polarised gluons inside unpolarised protons using quarkonium-pair production at the LHC
• Double-quarkonium production at a fixed-target experiment at the LHC (AFTER@LHC)
• Interparticle correlations in the production of J/ψpairs in proton-proton collisions
• Inclusive double-quarkonium production at the Large Hadron Collider
• QCD corrections to Upsilon production via color-octet states at the Tevatron and LHC
• Complete Nonrelativistic-QCD Prediction for Prompt Double $J/\psi$ Hadroproduction
• Studies of gluon TMDs and their evolution using quarkonium-pair production at the LHC
• Relativistic Correction to J/psi and Upsilon Pair Production
• Complete Study of Hadroproduction of a ${\rm Y}$ Meson Associated with a Prompt $J/\psi$
• Indication for Double Parton Scatterings in W + Prompt J/Psi Production at the LHC
• Production of $J/\psi +{\chi }_c$ and $J/\psi +J/\psi$ with real gluon emission at LHC
• Complete NLO QCD study of single- and double-quarkonium hadroproduction in the colour-evaporation model at the Tevatron and the LHC
• Prompt double $J/\psi$ production in proton-proton collisions at the LHC
• Double parton scattering in pair-production of $J/\psi$ mesons at the LHC revisited
• Relativistic corrections to double charmonium production in high energy proton-proton interaction
• Observation of charmonium pairs produced exclusively in $pp$ collisions
• Exclusive production of double $J/\psi$ mesons in hadronic collisions
• Pair double heavy diquark production in high energy proton-proton collisions
• Prospects for quarkonium studies at the high-luminosity LHC
• ${\rm Y}$-meson pair production at LHC
• Understanding the cross section of $e^{+}{e}^{-}\to \eta J/\psi$ process via nonrelativistic QCD
• Exclusive and diffractive quarkonium -- pair production at the LHC and FCC
• Production of double heavy quarkonium at super $Z$ factory
• $J/\psi$ Pair Production at the Tevatron with $\sqrt{s}=1.96~\mathrm{TeV}
• Relativistic corrections to η_c-pair production in high energy proton-proton collisions
• DJpsiFDC: an event generator for the process $gg\to J/\psi J/\psi$ at LHC
• Double heavy quarkonium production in diffractive processes at the Run 2 LHC energy
• p p -> J/psi+Upsilon+X as a clean probe to the quarkonium production mechanism
• Summary of the Workshop on Multi-Parton Interactions (MPI@LHC 2012)
• Hunting for possible Higgs-like boson beyond the Standard Model
• Quark polarization and transverse momentum effects on double quarkonium production in hadronic collisions