2021/03/16 by Raj Kishore, R. Kishore, Asmita Mukherjee +1 · 1 citation
Mathematics · Physics and Astronomy · #Algorithm #Asymmetry #Factorization #Gluon #High-Energy Particle Collisions Research #Mathematics #Nuclear physics #Octet #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Proton #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #hep-ph
paper · pdf · doi:10.1103/physrevd.104.094015
published in arXiv (Cornell University) 104(9) (Cornell University) · 25 pages, 7 figures
arxiv created 2021/03/16 · openalex publication_date 2021/03/16 · arxiv updated 2021/11/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a calculation of the cos (2 φh) asymmetry in J/ψ production in electron-proton collision at the future electron-ion collider (EIC), a useful channel to probe the gluon TMDs. We calculate the asymmetry at next-to-leading order (NLO) in αs in the framework of generalized factorization. The dominating sub-process is γ^* +g → J/ψ+g. The production of J/ψ is calculated in the non-relativistic QCD(NRQCD) framework with the inclusion of both color singlet and color octet contributions. Numerical estimates of the cos(2φh) asymmetry are given in the kinematical region to be accessed by the future EIC. The asymmetry depends on the parameterization of the gluon TMDs, as well as on the long distance matrix elements (LDMEs). We use both Gaussian-type parameterization and McLerran-Venugopalan model for the TMDs in the kinematical region of small-x, where the gluons play a dominant role. We obtain sizable asymmetry, which may be useful to probe the ratio of the linearly polarized and the unpolarized gluon distribution in the proton.