2025/01/18 by Hee Sok Chung, Chung, Hee Sok, U-Rae Kim +3
Materials Science · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #X-ray Diffraction in Crystallography
paper · pdf · doi:10.48550/arxiv.2501.10647
openalex publication_date 2025/01/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
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/ψ production rates at large transverse momentum.