Speaker
Description
The energy dependence of the total hadroproduction cross section for pseudoscalar quarkonia is computed via matching of the NLO Collinear-Factorisation (CF) results with Leading-Logarithmic resummation of higher-order corrections $\propto\alpha_s^{n}\ln^{n-1}(1/z)$ to the CF hard-scattering coefficient, where $z=M^2/\hat{s}$ with $\hat{s}$ being partonic center-of-mass energy squared. The resummation is performed using High-Energy Factorization(HEF). The resummation cures the collinear over-subtraction problem of the Next-to-Leading Order(NLO) CF calculation, stabilizing the high-energy behaviour of the cross section. Predictions of the NNLO $\alpha_s^2\ln(1/z)$ term of the CF hard-scattering coefficient are made. The matching is performed directly in $z$-space for the first time using the Inverse-Error Weighting (InEW) matching.
