Next-to-leading order analysis of $J/\psi +\gamma$ production in photon-photon collisions at CEPC

Abstract

We systematically investigate the production of $J/\psi +\gamma$ in $\gamma \gamma$ collisions within nonrelativistic QCD (NRQCD) factorization, with the direct-photon channel calculated specifically up to the next-to-leading order in ${\alpha }_s$. Calculations for CEPC energy region show the resolved photon contribution is negligible, while the direct photon process dominates, yielding substantial annual $J/\psi$ yields. Significant modifications to $J/\psi$ polarization parameters emerge from color-octet mechanisms, and different NRQCD long distance matrix elements (LDMEs) further yield distinct polarization patterns. Furthermore, the polarization predictions are highly sensitive to the ${}^3{P}_J^{[8]}$ LDME, while being insensitive to the ${}^1{S}_0^{[8]}$ and ${}^3{S}_1^{[8]}$ LDMEs. Leveraging the cleaner environment of $e^{+}{e}^{-}$ collisions versus hadronic processes, the production of $J/\psi$ associated with a photon in $\gamma \gamma$ collisions provides a high-precision platform to test LDMEs universality and resolve longstanding $J/\psi$ polarization puzzles.

arXiv comment19 pages, 7 figures, and 2 tables; accepted for publication in European Physical Journal C

References in corpus (47)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Generating Feynman Diagrams and Amplitudes with FeynArts 3
• Heavy quarkonium: progress, puzzles, and opportunities
• Algorithm FIRE -- Feynman Integral REduction
• Color-octet quarkonia production
• Color-Octet Fragmentation and the psi' Surplus at the Tevatron
• NLO Production and Decay of Quarkonium
• Improving the Weizsäcker-Williams Approximation in Electron-Proton Collisions
• J/psi polarization at Tevatron and LHC: Nonrelativistic-QCD factorization at the crossroads
• Polarization for Prompt J/psi, psi(2s) production at the Tevatron and LHC
• Higgs boson decays to quarkonia and the Hccbar coupling
• Fragmentation contributions to J/psi production at the Tevatron and the LHC
• New Observables in Inclusive Production of Quarkonia
• $Apart: A Generalized Mathematica Apart Function
• ${\eta }_c$ production at the LHC challenges nonrelativistic-QCD factorization
• Progress in FDC Project
• Radiatively Generated Parton Distributions of Real and Virtual Photons
• Inelastic photoproduction of polarised $J/\psi$
• Impact of ${\eta }_c$ hadroproduction data on charmonium production and polarization within NRQCD framework
• Relativistic corrections to Higgs boson decays to quarkonia
• Next-to-Leading-Order QCD corrections to J/ψ(Υ)+γproduction at the LHC
• Hadron production in gamma-gamma collisions as a background for e+e- linear colliders
• Real next-to-next-to-leading-order QCD corrections to J/psi and Upsilon hadroproduction in association with a photon
• The leading twist light-cone distribution amplitudes for the S-wave and P-wave quarkonia and their applications in single quarkonium exclusive productions
• Rare exclusive decays of the Z-boson revisited
• J/psi plus prompt-photon associated production in two-photon collisions at next-to-leading order
• NNLO QCD Corrections to $\gamma +{\eta }_c({\eta }_b)$ Exclusive Production in Electron-Positron Collision
• New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon
• $Z$-boson decays to a vector quarkonium plus a photon
• Decay and electromagnetic production of strongly coupled quarkonia in pNRQCD
• Testing Quarkonium Production with Photoproduced $J/\psi +\gamma$
• $J/\Psi$-Production at Photon-Photon Colliders as a Probe of the Color Octet Mechanism
• Color-Octet Contributions in the Associate J/psi+gamma Hadroproduction
• Associated $J/\psi +\gamma$ production as a probe of the polarized gluon distribution
• Addendum: New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon [Phys. Rev. D 95, 054018 (2017)]
• QCD leading order study of the $J/\psi$ leptoproduction at HERA within the nonrelativistic QCD framework
• Color Octet Contribution to $J/\psi$ Production at a Photon Linear Collider
• J/psi+gamma production at the LHC
• Pseudoscalar Quarkonium+gamma Production at NLL+NLO accuracy
• Prompt J/psi plus photon associated electroproduction at DESY HERA
• Exclusive quarkonium production or decay in soft gluon factorization
• Next-to-Next-to-Leading-Order Radiative Corrections to $e^{+}{e}^{-}\to {\chi }_{cJ}+\gamma$ at $B$ factory
• Associated J/psi + gamma Photoproduction as a Probe of the Colour-Octet Mechanism
• J/Psi Decay Lepton Distribution in Hadronic Collisions
• How well does nonrelativistic QCD factorization work at next-to-leading order?
• Exclusive C=+ charmonium production in $e^{+}{e}^{-}\to H+\gamma$ at B-factories within light cone formalism
• Associated production of $J/\psi$ and direct photon in the NRQCD and the ICEM using the high-energy factorization