1996/06/06 by K. Sridhar, Sridhar, K.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9606252
Talk given at the XXXIst Rencontres de Moriond, ``QCD and High Energy Hadronic Interactions'', March 1996, Les Arcs, France. (8 pages)
arxiv created 1996/06/06 · openalex publication_date 1996/06/06 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Theoretical analyses of the results on quarkonium production at large transverse momentum (pT) in p p collisions, at the Tevatron have revealed two novel features of the physics of quarkonium production : 1) the contribution of fragmentation of gluons and charm quarks to the cross-section at large pT, and 2) the importance of colour octet components of the quarkonium wave-function. I discuss the theoretical developments which have contributed to a reasonably consistent picture of quarkonium production at the Tevatron, and discuss large-pT J/ψ production at HERA and at LHC as important tests of the fragmentation picture. I also discuss our recent analysis of J/ψ production cross-sections at fixed-target energies, where we find that the energy dependence of the pT-integrated cross-sections for both pp and π- - p collisions is reasonably well reproduced, when the colour-octet components are included.