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Nucleon electromagnetic form factors and polarization observables in space-like and time-like regions | | Egle Tomasi-Gustafsson
; F. Lacroix
; C. Duterte
; G. I. Gakh
; | | Date: |
1 Mar 2005 | | Journal: | Eur.Phys.J. A24 (2005) 419-430 | | Subject: | nucl-th | | Abstract: | We perform a global analysis of the experimental data of the electromagnetic nucleon form factors, in space-like and time-like regions. We give the expressions of the observables in annihilation processes, such as $p+ar{p} o ell^+ +ell^- $, $ell=e$ or $mu$, in terms of form factors. We discuss some of the phenomenological models proposed in the literature for the space-like region, and consider their analytical continuation to the time-like region. After determining the parameters through a fit on the available data, we give predictions for the observables which will be experimentally accessible with large statistics, polarized annihilation reactions. | | Source: | arXiv, nucl-th/0503001 | | Services: | Forum | Review | PDF | Favorites | |
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