Next-to-leading-order tests of nonrelativistic-QCD factorization with $J/\psi$ yield and polarization

Abstract

We report on recent progress in testing the factorization formalism of nonrelativistic quantum chromodynamics (NRQCD) at next-to-leading order (NLO) for $J/\psi$ yield and polarization. We demonstrate that it is possible to unambiguously determine the leading color-octet long-distance matrix elements (LDMEs) in compliance with the velocity scaling rules through a global fit to experimental data of unpolarized $J/\psi$ production in $pp$, $p\bar{p}$, $ep$, $\gamma \gamma$, and $e^{+}{e}^{-}$ collisions.Three data sets not included in the fit, from hadroproduction and from photoproduction in the fixed-target and colliding-beam modes, are nicely reproduced. The polarization observables measured in different frames at DESY HERA and CERN LHC reasonably agree with NLO NRQCD predictions obtained using the LDMEs extracted from the global fit, while measurements from the FNAL Tevatron exhibit severe disagreement. We demonstrate that alternative LDME sets recently obtained in two other NLO NRQCD analyses of $J/\psi$ yield and polarization, with different philosophies, also fail to reconcile the Tevatron polarization data with the other available world data.

15 pages, 6 figures, accepted for publication in Mod. Phys. Lett. A. arXiv admin note: text overlap with arXiv:1105.0820

References in corpus (9)

• 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
• Improved determination of color-singlet nonrelativistic QCD matrix elements for S-wave charmonium
• QCD corrections to ${\mathbf{e}}^{+}{\mathbf{e}}^{-}\to \mathbf{J}/\mathbf{\psi gg}$ at B Factories
• Measurement of the e+e- -> J/psi ccbar cross section at \sqrt{s} ~10.6 GeV
• NRQCD Factorization and Velocity-dependence of NNLO Poles in Heavy Quarkonium Production
• Direct J/psi photoproduction at next-to-leading-order in nonrelativistic QCD

Cited by in corpus (24)

• The ALICE experiment: a journey through QCD
• ${\eta }_c$ production at the LHC challenges nonrelativistic-QCD factorization
• Quarkonium production in the LHC era: a polarized perspective
• Probing Quarkonium Production Mechanisms with Jet Substructure
• Complete Nonrelativistic-QCD Prediction for Prompt Double $J/\psi$ Hadroproduction
• Inclusive Production of Heavy Quarkonia in pNRQCD
• Inclusive production of $J/\psi$, $\psi (2S)$, and ${\rm Y}$ states in pNRQCD
• Next-to-leading order QCD corrections to paired $B_c$ production in $e^{+}{e}^{-}$ annihilation
• Production and polarization of $S$-wave quarkonia in potential nonrelativistic QCD
• Matching next-to-leading-order and high-energy-resummed calculations of heavy-quarkonium-hadroproduction cross sections
• Relativistic corrections to $J/\psi$ polarization in photo- and hadroproduction
• Polarized TMD fragmentation functions for $J/\psi$ production
• How well does nonrelativistic QCD factorization work at next-to-leading order?
• Pseudoscalar heavy-quarkonium hadroproduction from nonrelativistic fragmentation at NLL/NLO${}^{+}$
• Polarized $J/\psi$ production in semi-inclusive DIS at large $Q^2$: Comparing quark fragmentation and photon-gluon fusion
• Predictions for $h_c$ and $h_b$ production at the LHC
• Quarkonium Polarization and the Long Distance Matrix Elements Hierarchies using Jet Substructure
• NRQCD colour-octet expansion vs LHC quarkonium production: signs of a hierarchy puzzle?
• Associated production of $J/\psi$ and direct photon in the NRQCD and the ICEM using the high-energy factorization
• Experimental Review of the Quarkonium Physics at the LHC
• Resummation and renormalization of kinematical effects in inclusive $P$-wave quarkonium production
• Power expansion for heavy quarkonium production at next-to-leading order in ${\mathrm{e}}^{+}{\mathrm{e}}^{-}$ annihilation
• Bottomonia production in p+p collisions under NRQCD formalism
• J/$\psi$-hadron correlations at midrapidity in pp collisions at $\sqrt{s}$ = 13 TeV