The QED contribution to $J/\psi$ plus light hadrons production at B-factories

Abstract

To understand the direct $J/\psi +X_{\mathrm{non}-\mathrm{c}\bar{\mathrm{c}}}$ production mechanism in $e^{+}{e}^{-}$ annihilation, in this work, we propose to measure the inclusive $J/\psi$ plus light hadrons (LH) production at B-factories and present a detailed study on its QED production due to $\psi (2S)$ feed-down, where the $\psi (2S)$ are produced in $e^{+}{e}^{-}\to \psi (2S)+\gamma$ and $e^{+}{e}^{-}\to \psi (2S)+f\bar{f},f=lepton,lightquark$, and QED contribution to direct $J/\psi +q\bar{q}$ production with $q=u,d,s$ quark. We find that the QED contribution is huge in the whole phase space region, but can be reduced largely and is in the same order as the QCD contribution when a suitable cut on the angel ${\theta }_{J/\psi }$ between $J/\psi$ and the $e^{+}{e}^{-}$ beam is made. In this way, the cross section of $J/\psi +LH$ QCD production %which was predicted theoretical at next-to-leading order QCD together with relativistic correction, can be obtained by subtracting the QED contribution from the experimental measurement on inclusive $J/\psi$ plus light hadrons. To help to remove the QED background, we also calculate the angular and momentum distribution of $J/\psi$ in the QED contribution.

19 pages, 6 figures

References in corpus (27)

• Heavy quarkonium: progress, puzzles, and opportunities
• QCD and strongly coupled gauge theories: challenges and perspectives
• J/psi polarization at hadron colliders in nonrelativistic QCD
• 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
• J/psi polarization at Tevatron and LHC: Nonrelativistic-QCD factorization at the crossroads
• World data of J/psi production consolidate NRQCD factorization at NLO
• Polarization for Prompt J/psi, psi(2s) production at the Tevatron and LHC
• QCD corrections to J/psi polarization of hadronproduction at Tevatron and LHC
• ${\eta }_c$ production at the LHC challenges nonrelativistic-QCD factorization
• Relativistic corrections to $J/\psi$ exclusive and inclusive double charm production at B factories
• 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
• Measurement of the ${\eta }_c(1S)$ production cross-section in proton-proton collisions via the decay ${\eta }_c(1S)\to p\bar{p}$
• 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 tests of nonrelativistic-QCD factorization with $J/\psi$ yield and polarization
• Measurement of the e+e- -> J/psi ccbar cross section at \sqrt{s} ~10.6 GeV
• J/psi production at HERA
• Factorization and NLO QCD correction in e^+ e^- \to J/ψ(ψ(2S))+ χ_{c0} at B Factories}
• Probing nonrelativistic QCD factorization in polarized J/psi photoproduction at next-to-leading order
• Next-to-Leading-Order QCD Corrections to e+ e- --> J/psi c c_bar at the B Factories
• QCD corrections to double J/ψproduction in e+e- annihilation at \sqrt{s}=10.6 GeV
• J/ψpolarization in photo-production up-to the next-to-leading order of QCD
• Color-singlet J/psi production at alpha_s^6 in Upsilon decay