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

Physics Letters B 2026 Open access

Read full text
Authors: Cong Li, Xu-Dong Huang, Wen-Long Sang
DOI: 10.1016/j.physletb.2026.140150
Cited by: 2
References: 37

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.

Fields of Study & Subjects

Particle physics theoretical and experimental studies Quantum Chromodynamics and Particle Interactions High-Energy Particle Collisions Research

Publication details

Journal / source
Physics Letters B
Publisher
Elsevier BV
Volume
873
Pages
140150–140150
Publication date
8 January 2026
Language
EN