1997/01/17 by P. Kroll, Peter Kroll, Kroll, Peter
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9701319
12 pages, 3 postscript figures, Latex, to be published in the proceedings of the Third Workshop on Diquarks, Torino (October 1996)
arxiv created 1997/01/17 · openalex publication_date 1997/01/17 · arxiv updated 2009/11/30 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28
The analysis of the πγ transition form factor provides severe constraints on the pion's wave function. This information is used to examine charmonium decays into two pions critically. It will be argued that the standard perturbative QCD analysis of these reactions fails, i.e. the need for additional contributions can convincingly be demonstrated. Colour-octet admixtures to the charmonium states are proposed as a possible dynamical mechanisms to solve the puzzle. Consequences of the πγ analysis for the electromagnetic form factor of the pion are also discussed.