Press Authors, O. Proof of Factorization of χcJdocumentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} egin{document}$$chi _{ ext{cJ}}$$end{document} Production in Non-Equilibrium QCD at RHIC and LHC in Color Singlet Mechanism. J Theor Appl phys 2023, 11 (4). https://doi.org/10.1007/s40094-017-0267-7.