Sam R. Edwards, André Sternbeck, Lorenz von Smekal
Owing to their fractional electric charges, quarks are blind to
transformations that combine a color center phase with an appropriate
electromagnetic one. Such transformations are part of a global $Z_6$-like
center symmetry of the Standard Model that is lost when quantum chromodynamics
(QCD) is treated as an isolated theory. This symmetry and the corresponding
topological defects may be relevant to non-perturbative phenomena such as quark
confinement, much like center symmetry and ordinary center vortices are in pure
SU($N$) gauge theories. Here we report on our investigations of an analogous
symmetry in a 2-color model with dynamical Wilson quarks carrying half-integer
electric charge.
View original:
http://arxiv.org/abs/1202.1477
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