Transition Form-Factor for ${\eta }_Q$ at NNLO in the strong coupling ${\alpha }_s$ and with all-order $v^2$ resummation

Izabela Babiarz, Chris A. Flett, Melih A. Ozcelik +2

In this work, we discuss both relativistic and perturbative QCD corrections to the transition form-factor ${\mathcal{F}}_{{\eta }_Q}(t_1,t_2)$ for the process $γ^*(q_1) γ^*(q_2) \leftrighta…