J/ψProduction Via Photon Fragmentation at Hadron Colliders

Abstract

The transverse momentum ($p_t$) distributions of production and polarization for $J/\psi$ measured by CDF Collaboration are still challenging our understanding of the heavy quarkonium production mechanism even with recent significant theoretical progresses on the next-to-leading-order (NLO) QCD calculation. We suggest a new mechanism for $J/\psi$ production at hadron collider, $pp(\bar{p})\to {\gamma }^{\ast }(J/\psi )+X$ with $J/\psi$ from a virtual photon ${\gamma }^{\ast }$ fragmentation. Our calculations show it's $p_t$ distribution at NLO will be larger than that of the conventional $J/\psi$ production from the color-singlet mechanism at NLO when $p_t>26$ (35) GeV at the Tevatron (LHC) and reach about 6 (10) times of the conventional one when $p_t=50$ (100) GeV at the Tevatron (LHC), in spite of a suppression factor $(\alpha /{\alpha }_s{)}^2$ that is associated with the QED and QCD coupling constants. In addition, it also has large impact on the $p_t$ distribution of $J/\psi$ polarization in large $p_t$ region. Therefore, it is a important mechanism for $J/\psi$ production at large $p_t$ region especially for the LHC.

4 pages, 3 figures,

References in corpus (19)

• 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
• QCD corrections to J/psi and Upsilon production at hadron colliders
• Polarizations of J/psi and psi(2S) Mesons Produced in ppbar Collisions at 1.96 TeV
• J/psi, psi' and Upsilon Production at Hadron Colliders: a review
• QCD corrections to J/psi polarization of hadronproduction at Tevatron and LHC
• On the mechanisms of heavy-quarkonium hadroproduction
• Hadroproduction of J/psi and Upsilon in association with a heavy-quark pair
• QCD corrections to J/psi production via color octet states at Tevatron and LHC
• Double charm production e^+ e^- \to J/ψ+ c \bar{c} at B factories with next-to-leading order QCD corrections
• A complete NLO calculation of the $J/\psi$ and ${\psi }^{\prime }$ production at hadron colliders
• 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
• Possible solution of the J/psi production puzzle
• Production of psi(2S) Mesons in ppbar Collisions at 1.96 TeV
• QCD corrections to double J/ψproduction in e+e- annihilation at \sqrt{s}=10.6 GeV
• Next-to-Leading-Order QCD Corrections to e+ e- --> J/psi c c_bar at the B Factories
• Charm Physics - A Field Full with Challenges and Opportunities

Cited by in corpus (2)

• Resummation of relativistic corrections to exclusive productions of charmonia in e+ e- collisions
• Higher-order corrections to exclusive production of charmonia at B factories