Year: 2025
Type: conference-paper
Abstract: We resum threshold double logarithms in inclusive production of heavy quarkonium that arise from singularities near the boundary of phase space. This resolves the catastrophic failure in the conventional approach based on fixed-order perturbation theory calculations in nonrelativistic QCD, where quarkonium cross sections at large transverse momentum can turn negative. We identify the root cause of this negative cross section problem as the appearance of threshold logarithms in radiative corrections, and resum them to all orders in perturbation theory at the leading double logarithmic level. We find that resummation of threshold logarithms is imperative for describing measured $J/\psi$ production rates at large transverse momentum.
DOI: 10.22323/1.483.0135
Authors: Hee Sok Chung, U-Rae Kim, Jungil Lee
Institutions: Korea University, Korea Military Academy
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Award: G484813351
OpenAlex ID: W4415516699