Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10726435 | Progress in Particle and Nuclear Physics | 2005 | 14 Pages |
Abstract
The unitary and analytic model of nucleon electromagnetic structure, describing all existing nucleon form factor data, is briefly reviewed. Then in the framework of this model the problem of inconsistency of older proton electric form factor data in a space-like region (obtained from the eâpâeâp process by the Rosenbluth technique) with recent Jefferson Lab data on the ratio GEp(t)/GMp(t) (measured in a precise polarization eââpâeâpâ experiment) is suggested to be solved in favor of the latter data which, however, unlike older data imply the existence of a form factor zero, i.e. a diffraction minimum in |GEp(t)| around t=âQ2=â13GeV2. The new behavior of GEp(t) with the zero gives a modified proton charge distribution with an enlarged value of the mean square charge radius.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
C. AdamuÅ¡ÄÃn, S. DubniÄka, A.Z. DubniÄková, P. Weisenpacher,