1995/06/09 by G. Schüler, Gerhard A. Schuler, Schuler, Gerhard A.
Engineering · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Laser Material Processing Techniques #Quantum Mechanics and Applications #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9506279
Latex, 7 pages
arxiv created 1995/06/09 · openalex publication_date 1995/06/09 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We discuss a dispersion relation in the photon mass and show how (in principle) model-independent constraints on the parton distribution functions of the photon, notably a momentum sumrule, can be obtained. We present two sets of parametrizations, SaS~1 and~2, corresponding to two rather extreme realizations of the non-perturbative part. Inclusive electron scattering off a real photon is found to be insufficient to constrain the non-perturbative components. The additional sensitivity provided by the photon virtuality is outlined. Previous approaches to model the non-perturbative input distributions are commented upon.