The Cheshire Cat Bag Model: Color Anomaly and $η'$ Properties
arXiv:hep-ph/9210220 · doi:10.1016/0375-9474(93)90677-P
Abstract
We show that color can leak from a QCD bag if we allow for pseudoscalar isoscalar singlet ($η'$) coupling at the surface. To enforce total confinement of color an additional boundary term is suggested. New relations between the $η'$ mass and decay constant and the QCD gluon condensates are derived and compared with the empirical parameters.
7 pages, LaTeX, Nordita - 92/68 N