Heavy Mesons in Two Dimensions
arXiv:hep-ph/9204206 · doi:10.1103/PhysRevLett.69.1018
Abstract
The large mass limit of QCD uncovers symmetries that are not present in the QCD lagrangian. These symmetries have been applied to physical (finite mass) systems, such as B and D mesons. We explore the validity of this approximation in the 't Hooft model (two-dimensional QCD in the large-N approximation). We find that the large mass approximation is good, even at the charm mass, for form factors, but it breaks down for the pseudoscalar decay constant.
4 pages, 3 figures incl