PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - T06 QCD and Hadronic Physics
Revisiting inclusive production of J/ψ and Υ in high-energy γγ collisions
Y. Yedelkina*, J.P. Lansberg and M. Nefedov
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Pre-published on: February 23, 2024
Published on: March 21, 2024
The impact of Next-to-Leading Order (NLO) QCD corrections to the differential distributions of $J/\psi$ and $\Upsilon$ mesons produced inclusively in $\gamma\gamma$ collisions is discussed for the kinematical conditions of LEP II for DELPHI and at the future Circular Electron-Positron Collider (CEPC). We take into account all sizeable contributions at LO in $v^2$ in NRQCD factorisation: 1) pure QED process $\gamma + \gamma \rightarrow J/\psi({}^3S^{[1]}_1) + \gamma$ up to $\alpha^3\alpha_s$, 2) single-resolved-photon contributions up to $\alpha_s^4$, 3) $\gamma+\gamma\to J/\psi + c\bar{c}$ up to $\alpha^2\alpha_s$ and 4) $\gamma+\gamma\to J/\psi + ggg$ up to $\alpha^2\alpha_s^3$. We will also discuss the pure QED process as a contribution to the exclusive production in ultra-peripheral heavy-ion collisions (UPC) at the LHC.
DOI: https://doi.org/10.22323/1.449.0271
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