Speaker
Jean-Philippe Lansberg
(Université Paris-Saclay (FR))
Description
I will review the impact of QCD corrections to quarkonium production in inclusive and exclusive reactions. First, I will explain how they significantly alter the cross section at mid and large $p_T$ in inclusive photo- and hadro-production. Second, I will discuss the perturbative instability arising at high energies in $p_T$-integrated fixed-order computations and discuss how they can be dealt with either via a specific factorisation-scale choice or by resummation of high-energy logarithms via high-energy factorisation. Third, I will focus on exclusive photoproduction plagued by the same high-energy perturbative instabilities and exclusive production in photon fusion.
Author
Jean-Philippe Lansberg
(Université Paris-Saclay (FR))
