Orateur
Maxim Nefedov
(IJClab, Orsay)
Description
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 revisited for the kinematical conditions of LEPII DELPHI, the Circular Electron-Positron Collider (CEPC) and the Future Circular (Lepton) Collider (FCC-ee). We take into account all sizeable LO in $v^2$ contributions in NRQCD factorization: 1) pure QED process $\gamma + \gamma \rightarrow J/\psi({}^3S^{[1]}_1) + \gamma$ at NLO in $\alpha_s$, 2) single-resolved photon contribution at NLO in $\alpha_s$, 3) $\gamma+\gamma\to J/\psi + c\bar{c}$ in the LO in $\alpha_s$ and 4) $\gamma+\gamma\to J/\psi + ggg$ in the LO in $\alpha_s$.
Auteur principal
Maxim Nefedov
(IJClab, Orsay)
