Speaker
Jean-Philippe Lansberg
(IJCLab - Université Paris-Saclay - CNRS (FR))
Description
I will present our novel study of quarkonium-production at ultra-high transverse momentum at the LHC. We have performed a complete computation at NLO $(\alpha_s^3)$+ NLL $(\alpha_s^{n+1} \ln^n(p_T/m_H))$ using leading-power Fragmentation Functions (FFs). We have performed a thorough analysis of the theoretical uncertainties including those from the FF modelling, the scales ($\mu_R,\mu_F,\mu_{frag.}$) and the PDF uncertainties. We have revisited all the channels previously studied with FFs at LO+LL. Our analysis of the recent CMS and ATLAS data seems to reveal a different scaling behaviour between 50 and 300 GeV.
Authors
Jean-Philippe Lansberg
(IJCLab - Université Paris-Saclay - CNRS (FR))
Kate Lynch
(UC Dublin and Paris-Saclay University IJClab)
Valerio Bertone
(IRFU, CEA, Université Paris-Saclay)
