2015/11/30 by S. P. Baranov, Amir H. Rezaeian · 26 citations
Mathematics · Physics and Astronomy · #Algorithm #Factorization #High-Energy Particle Collisions Research #Large Hadron Collider #Mathematics #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Rapidity #hep-ex #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.93.114011
published in Physical review. D/Physical review. D. 93(11) (American Physical Society) · 10 pages, 14 figures; v2: version includes a complete LO NRQCD calculation in the kT-factorization approach, Color-Octet contributions added, 5 new plots added. The version to appear in PRD
arxiv created 2016/06/03 · openalex publication_date 2016/06/10 · arxiv updated 2016/06/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We provide a detailed study of prompt double J/\ensuremathψ production within the nonrelativistic QCD (NRQCD) framework in proton-proton collisions at the LHC. We confront the recent LHC data with the results obtained at leading order (LO) in the NRQCD framework within two approaches of the collinear factorization and the kT-factorization. We show that the LHCb data are consistent with the kT-factorized LO NRQCD results. We show that the full LO NRQCD formalism cannot describe the recent CMS data, with about one order of magnitude discrepancy. If the CMS data are confirmed, this indicates rather large higher-order corrections for prompt double J/\ensuremathψ production. We provide various predictions which can further test the NRQCD-based approach at the LHC in a kinematic region that LO contributions dominate. We also investigate long-range in rapidity double J/\ensuremathψ correlations. We found no evidence of a ridge-like structure for double J/\ensuremathψ production in proton-proton collisions at the LHC up to subleading \ensuremathαs6 accuracy.