J/ψpolarization in photo-production up-to the next-to-leading order of QCD

Abstract

We investigate the J/psi polarization in photoproduction at the Hadron Electron Ring Accelerator(HERA) up to the next-to-leading order of QCD. The results show that the transverse momentum p_t and energy fraction z distributions of J/psi production do not agree with the observed ones very well. The theoretical uncertainties for the z distributions of the J/psi polarization parameters with respect to various choices of the renormalization and factorization scales are too large to give an accurate prediction. The uncertainties for the p_t distributions of these parameters are small when p_t>3GeV and the obtained p_t distributions can not describe the experimental data even in this region.

5 pages, 3 figures. Discussion on the theoretical uncertainties from the choice of renormalization scale was added

References in corpus (14)

• QCD corrections to J/psi and Upsilon production at hadron colliders
• Upsilon production at the Tevatron and the LHC
• J/psi, psi' and Upsilon Production at Hadron Colliders: a review
• QCD corrections to J/psi polarization of hadronproduction at Tevatron and LHC
• QCD corrections to J/psi plus eta_c production in e+e- annihilation at sqrt{s}=10.6 GeV
• Double charm production e^+ e^- \to J/ψ+ c \bar{c} at B factories with next-to-leading order QCD corrections
• QCD corrections to ${\mathbf{e}}^{+}{\mathbf{e}}^{-}\to \mathbf{J}/\mathbf{\psi gg}$ at B Factories
• Next-to-Leading-Order QCD Corrections to e^ + e^- -> J/ψ+gg at the B Factories
• QCD corrections to polarization of J/ψand Υat Fermilab Tevatron and CERN LHC
• Next-to-Leading-Order QCD corrections to J/ψ(Υ)+γproduction at the LHC
• J/psi production at HERA
• Factorization and NLO QCD correction in e^+ e^- \to J/ψ(ψ(2S))+ χ_{c0} at B Factories}
• QCD corrections to double J/ψproduction in e+e- annihilation at \sqrt{s}=10.6 GeV
• Charm Physics - A Field Full with Challenges and Opportunities

Cited by in corpus (16)

• Heavy quarkonium: progress, puzzles, and opportunities
• J/psi (psi') production at the Tevatron and LHC at O(α_s^4v^4) in nonrelativistic QCD
• Reconciling J/psi production at HERA, RHIC, Tevatron, and LHC with NRQCD factorization at next-to-leading order
• Polarization for Prompt J/psi, psi(2s) production at the Tevatron and LHC
• QCD radiative corrections to ${\chi }_{cJ}$ production at hadron colliders
• Inclusive double-quarkonium production at the Large Hadron Collider
• Next-to-Leading-Order QCD Corrections to e+ e- --> J/psi c c_bar at the B Factories
• QCD corrections to Upsilon production via color-octet states at the Tevatron and LHC
• Large-P_T inclusive photoproduction of J/psi in electron-proton collisions at HERA and the EIC
• Photoproduction of fully charmed tetraquark at electron-ion colliders
• The production of the doubly charmed baryon in deeply inelastic $ep$ scattering at the Large Hadron Electron Collider
• Color-singlet J/psi production at alpha_s^6 in Upsilon decay
• p p -> J/psi+Upsilon+X as a clean probe to the quarkonium production mechanism
• Study of charmonium production using decays to hadronic final states with the LHCb experiment
• ${\rm Y}$ electroproduction at HERA, EIC, and LHeC within the nonrelativistic QCD framework
• J/psi production in ep collisions at HERA