Nucleon;
Delta;
Form factors;
Dyson-Schwinger equations;
Faddeev equations;
D O I:
10.1016/j.ppnp.2011.12.024
中图分类号:
O57 [原子核物理学、高能物理学];
学科分类号:
070202 ;
摘要:
I briefly summarize recent results for nucleon and Delta(1232) electromagnetic, axial and transition form factors in the Dyson-Schwinger approach. The calculation of the current diagrams from the quark-gluon level enables a transparent discussion of common features such as: the implications of dynamical chiral symmetry breaking and quark orbital angular momentum, the timelike structure of the form factors, and their interpretation in terms of missing pion-cloud effects. (C) 2012 Elsevier B.V. All rights reserved.