High lying N* studies in electromagnetic double charged pion production.

Authors :: Mokeev, V. I.
Ripani, M.
Anghinolfi, M.
Battaglieri, M.
De Vita, R.
Fedotov, G. V.
Golovach, E. N.
Ishkhanov, B. S.
Osipenko, M. V.
Ricco, G.
Sapunenko, V.
Taiuti, M.
Source :: AIP Conference Proceedings. 2002, Vol. 619 Issue 1, p505. 5p.
Publication Year :: 2002
Abstract: A phenomenological model for double charged pion production is presented, aimed to extract N[sup *] electromagnetic form factors from measured observables (differential cross-sections, asymmetries). The preliminary results of CLAS data analysis on double charged pion production by virtual photons are discussed, focusing on high lying N[sup *] electromagnetic excitation and signals from possible "missing" baryon states. [ABSTRACT FROM AUTHOR]