Curing the high-energy perturbative instability of vector-quarkonium-photoproduction cross sections at order $$\alpha \alpha _s^3$$ with high-energy factorisation
Curing the high-energy perturbative instability of vector-quarkonium-photoproduction cross sections at order $$\alpha \alpha _s^3$$ with high-energy factorisation
Abstract We cure the perturbative instability of the total-inclusive-photoproduction cross sections of vector S -wave quarkonia observed at high photon-proton-collision energies ( $$\sqrt{s_{\gamma p}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mrow> <mml:mi>γ</mml:mi> <mml:mi>p</mml:mi> </mml:mrow> </mml:msub> </mml:msqrt> </mml:math> ) in Next-to-Leading Order (NLO) Collinear-Factorisation (CF) computations. This is achieved using High-Energy Factorisation …