2015/06/29 by S. Mohammad Moosavi Nejad, S. M. Moosavi Nejad · 2 citations
Physics and Astronomy · #Fragmentation (computing) #Fragmentation function #Gluon #High-Energy Particle Collisions Research #Meson #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Pseudoscalar #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quarkonium #hep-ph
paper · pdf · doi:10.1140/epjp/i2015-15136-y
published as Eur.Phys.J.Plus 130 (2015) no.7, 136
arxiv created 2015/06/29 · openalex publication_date 2015/07/01 · arxiv updated 2016/03/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The production of heavy quarkonia is a powerful tool to test our understanding of strong interaction dynamics. It is well-known that the dominant production mechanism for heavy quarkonia with large transverse momentum is fragmentation. In this work we, analytically, calculate the QCD leading order contribution to the process-independent fragmentation functions (FFs) for a gluon to split into the vector (J/ψ) and pseudoscalar (ηc) S-wave charmonium states. The analyses of this paper differ in which we present, for the first time, an analytical form of the g→ J/ψ FF using a different approach (Suzuki's model) in comparison with other results presented in literatures, where the Braaten's scheme was used and the two-dimensional integrals were presented for the gluon FFs which must be evaluated numerically. The universal fragmentation probability for the g→ J/ψ is about 10-6 which is in good consistency with the result obtained in the Braaten's model.