%0 Journal Article
%T Photoproduction of excited baryons in the 1 /Nc expansion of QCD
%A Scoccola
%A N. N.
%J Brazilian Journal of Physics
%D 2008
%I Scientific Electronic Library Online
%R 10.1590/S0103-97332008000400013
%X we present results for the photoproduction helicity amplitudes of excited baryons obtained in the context of the 1 /nc expansion of qcd. the results show that, in order to get a satisfactory description of the observed photoproduction amplitudes, the sub-leading corrections in 1/nc are important. we also find that, while one-body effective operators are dominant, there is some evidence for the need of two-body effects which, in general, are not included in quark model calculations.
%K excited baryon photoproduction
%K large nc qcd.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-97332008000400013&lng=en&nrm=iso&tlng=en