Tomasi-Gustafsson, E. (2004) Nucleon electromagnetic structure: Past, present, and future. Il nuovo cimento C, 27 (5). pp. 413-422. ISSN 1826-9885
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Abstract
We present the experimental status of electromagnetic hadron form factors. New and surprising results, based on polarization measurements, have been recently obtained for the electric proton and neutron form factors. In particular, the electric and magnetic distributions inside the proton appear not to be the same, in disagreement with results extracted from the unpolarized cross-section, using the Rosenbluth separation. The new findings have given rise to a large number of papers and different speculations, as they question directly the models of nucleon structure and the reaction mechanism itself (based on 1γ-exchange), with a possible revision of the calculation of radiative corrections, two-photon contribution, etc. New data in time-like region are also available, through annihilation reactions. A large interest in this field arises, due also to the possibility of new measurements in polarized electron nucleon elastic scattering at JLab, and also in the time-like region, at Frascati and at the future FAIR international facility.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Elastic electron scattering ; Electromagnetic form factors |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 14 Mar 2020 12:01 |
| Last Modified: | 14 Mar 2020 12:01 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/15251 |
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