Space- and time-like electromagnetic form factors of the nucleon

Abstract

Recent experimental data on space- and time-like form factors of the nucleon are analyzed in terms of a two-component model with a quark-like intrinsics structure and a meson cloud. A good overall agreement is found for all electromagnetic form factors with the exception of the neutron magnetic form factor in the time-like region.

Comments: 15 pages, 1 table, 13 figures, invited talk at XXVIII Symposium on Nuclear Physics, Cocoyoc, Mexico, January 4-7, 2005, to be published in Revista Mexicana de Fisica. Modified conclusions and updated references