NLO QCD Corrections for $J/\psi +c+\bar{c}$ Production in Photon-Photon Collision

Abstract

The $\gamma +\gamma \to J/\psi +c+\bar{c}$ inclusive process is an extremely important subprocess in $J/\psi$ production via photon-photon scattering, like at LEP\uppercase\expandafter{\romannumeral2} or various types future electron-positron colliders. In this work we perform the next-to-leading(NLO) QCD corrections to this process in the framework of non-relativistic QCD(NRQCD) factorization formalism, the first NLO calculation for two projectiles to 3-body quarkonium inclusive production process. By setting the center-of-mass energy at LEP\uppercase\expandafter{\romannumeral2}, the $\sqrt{s}=197$ GeV, we conduct analyses of the $p_t^2$ distribution and total cross section of this process at the NLO accuracy. It turns out that the total cross section is moderately enhanced by the NLO correction with a $K$ factor of about 1.46, and hence the discrepancy between DELPHI data and color-singlet(CS) calculation is reduced while the color-octet(CO) contributions are still inevitable at this order. At the future Circular Electron-Positron Collider(CEPC), the NLO corrections are found to be more significant, with a $K$ factor of about 1.76.

expressions are properly modified

References in corpus (5)

• Algorithm FIRE -- Feynman Integral REduction
• $Apart: A Generalized Mathematica Apart Function
• 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
• Next-to-Leading-Order QCD Corrections to e+ e- --> J/psi c c_bar at the B Factories

Cited by in corpus (2)

• NLO QCD corrections to pseudoscalar quarkonium production with two heavy flavors in photon-photon collision
• Study of charmonium production using decays to hadronic final states with the LHCb experiment