2018/11/30 by Raj Kishore, R. Kishore, Asmita Mukherjee · 23 citations
Mathematics · Physics and Astronomy · #Algorithm #Asymmetry #Distribution (mathematics) #Factorization #Gluon #High-Energy Particle Collisions Research #Mathematics #Order (exchange) #Parametrization (atmospheric modeling) #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #hep-ph
paper · pdf · doi:10.1103/physrevd.99.054012
published in Physical review. D/Physical review. D. 99(5) (American Physical Society) · Version to appear in Phys. Rev. D
openalex created_date 2018/11/29 · arxiv created 2019/03/09 · openalex publication_date 2019/03/18 · arxiv updated 2019/03/27 · openalex updated_date 2026/08/05
We calculate the cos2\ensuremathφh asymmetry in J/\ensuremathψ production in electron-proton collision for the kinematics of the planned electron-ion collider (EIC). This directly probes the Weisz"acker-Williams type linearly polarized gluon distribution. Assuming generalized factorization, we calculate the asymmetry at next-to-leading-order when the energy fraction of the J/\ensuremathψ satisfies z<1 and the dominating subprocess is \ensuremathγ*+g\ensuremath→c+c+g. We use the nonrelativistic QCD based color singlet model for J/\ensuremathψ production. We investigate the small x region which will be accessible at the EIC. We present the upper bound of the asymmetry, as well as estimate it using a (i) Gaussian-type parametrization for the transverse momentum dependent parton distributions and (ii) McLerran-Venugopalan model at small x. We find small but sizable asymmetry in all three cases.