Comparison of potential models through HQETJames
نویسنده
چکیده
I calculate heavy-light decay constants in a nonrelativistic potential model. The resulting estimate of heavy quark symmetry breaking connicts with similar estimates from lattice QCD. I show that a semirelativistic potential model eliminates the connict. Using the results of heavy quark eeective theory allows me to identify and compensate for shortcomings in the model calculations in addition to isolating the source of the diierences in the two models. The results lead to a rule as to where the nonrelativistic quark model gives misleading predictions.
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