Comparison of potential models through HQET

Details Comparison of potential models through HQET Comparison of potential models through HQET

1995-04-28

arxiv.org/abs/hep-ph/9504425v1

Phys.Rev.D52:2926-2934,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, LaTeX with epsf.sty. Figures included through uufiles. Compressed Postscript available at ftp://phenom.physics.wis

Scientific paper

10.1103/PhysRevD.52.2926

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

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