Heavy Mesons in Two Dimensions

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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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.

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