Dressed-quark anomalous magnetic moments
arXiv:1009.3458 · doi:10.1103/PhysRevLett.106.072001
Abstract
Perturbation theory predicts that a massless fermion cannot possess a measurable magnetic moment. We explain, however, that the nonperturbative phenomenon of dynamical chiral symmetry breaking generates a momentum-dependent anomalous chromomagnetic moment for dressed light-quarks, which is large at infrared momenta; and demonstrate that consequently these same quarks also possess an anomalous electromagnetic moment with similar magnitude and opposite sign.
4 pages, 1 2-panel figure