Constraining gluon density of pions at large $x$ by pion-induced $J/\psi$ production

Abstract

The gluon distributions of the pion obtained from various global fits exhibit large variations among them. Within the framework of the color evaporation model, we show that the existing pion-induced $J/\psi$ production data, usually not included in the global fits, can impose useful additional constraints on the pion parton distribution functions (PDFs). In particular, these data can probe the pion's gluon densities at large $x$. Existing pion-induced $J/\psi$ data covering a broad range of beam momenta are compared with next-to-leading-order QCD calculations using various sets of pion PDFs. It is found that $J/\psi$ data measured at forward rapidity and at sufficiently high beam momentum are sensitive to the large-$x$ gluon distribution of pions. The current $J/\psi$ data favor the Sutton-Martin-Roberts-Stirling and Gluck-Reya-Vogt pion PDFs, containing significant gluon content at large $x$.

33 pages, 12 figures and 4 tables. Published version

References in corpus (12)

• Heavy quarkonium: progress, puzzles, and opportunities
• LHAPDF6: parton density access in the LHC precision era
• Large-Momentum Effective Theory
• Soft-Gluon Resummation and the Valence Parton Distribution Function of the Pion
• Pion Valence Quark Distribution from Matrix Element Calculated in Lattice QCD
• Parton Distribution Functions of the Charged Pion Within The xFitter Framework
• Parton Distribution Functions from a Light Front Hamiltonian and QCD Evolution for Light Mesons
• Basic features of the pion valence-quark distribution function
• Pion valence quark distribution from current-current correlation in lattice QCD
• Analysis of charmonium production at fixed-target experiments in the NRQCD approach
• Complete NLO QCD study of single- and double-quarkonium hadroproduction in the colour-evaporation model at the Tevatron and the LHC
• Meson cloud effects on the pion quark distribution function in the chiral constituent quark model

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• A New Extraction of Pion Parton Distributions in the Statistical Model
• NRQCD analysis of charmonium production with pion and proton beams at fixed-target energies
• Fixed-target charmonium production and pion parton distributions
• Gluon distributions and mass decompositions of the pion and kaon
• Pion PDFs confronted by Fixed-Target Charmonium Production
• Regarding the distribution of glue in the pion
• Parametrization of Quark and Gluon Generalized Parton Distributions in a Dynamical Framework
• Probing Pion Valence Quark Distribution with Beam-charge Asymmetry of Pion-induced $J/\psi$ Production