Nucleon form factors: From the space-like to the time-like region

✍ Scribed by Ulf-G. Meißner

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 594 KB
• Volume: 623
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(97)00453-3

✦ Synopsis

I discuss how dispersion relations can be used to analyse the nucleon electromagnetic form factors, with particular emphasis on the constraints from unitarity and pQCD. Results for nucleon radii, vector-meson couplings, the onset of pQCD and bounds on the strangeness form factors are presented. The em form factors in the time-like region reveal some interesting physics which is not yet understood in full detail. The need for a better data basis at low, intermediate and large momentum transfer and also in the time-like region is stressed.