Dressed-quark anomalous magnetic moments
Lei Chang, Yu-Xin Liu, Craig D. Roberts
TL;DR
This paper shows that nonperturbative effects in quantum chromodynamics generate significant anomalous magnetic moments for dressed light-quarks, despite perturbation theory predicting none for massless fermions.
Contribution
It reveals that dynamical chiral symmetry breaking induces large momentum-dependent anomalous magnetic moments in dressed light-quarks, a novel nonperturbative phenomenon.
Findings
Dressed light-quarks acquire large anomalous chromomagnetic moments at infrared momenta.
These quarks also have significant anomalous electromagnetic moments with opposite sign.
The phenomenon arises from dynamical chiral symmetry breaking, not perturbative effects.
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.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.