Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1992-04-02
Phys.Rev.Lett.69:1018-1021,1992
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 3 figures incl
Scientific paper
10.1103/PhysRevLett.69.1018
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.
Grinstein Benjamin
Mende Paul F.
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