Work

Two loop QCD corrections to e + e − → J / ψ + η c in asymptotic expansion

Year: 2026

Type: article

Abstract: Within the framework of NRQCD, the two-loop QCD corrections to the short-distance coefficient for the process e + e − → J / ψ + η c have been obtained in asymptotic expansion over r = 16 m c 2 / s up to r 15 , sufficient for phenomenological studies. The obtained leading logarithmic terms can facilitate the resummation of large logarithms. We provide cross section predictions in both on-shell and M S ‾ mass schemes, including μ R uncertainties. Both mass schemes give similar results, consistent with experimental data.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2026.140150

Authors: Cong Li, Xu-Dong Huang, Wen-Long Sang

Institutions: Southwest University, Chongqing Normal University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Chongqing Normal University, National Natural Science Foundation of China, Natural Science Foundation of Chongqing

Awards: G1176642483, G3643583544, G3655154165, G6151898534