Lattice results for the decay constant of heavy-light vector mesons

Details Lattice results for the decay constant of heavy-light vector mesons Lattice results for the decay constant of heavy-light vector mesons

2001-09-19

arxiv.org/abs/hep-lat/0109015v2

Phys.Rev.D65:014510,2002

Physics

High Energy Physics

High Energy Physics - Lattice

11 pages, 3 postscript figs., revtex; two references added

Scientific paper

10.1103/PhysRevD.65.014510

We compute the leptonic decay constants of heavy-light vector mesons in the quenched approximation. The reliability of lattice computations for heavy quarks is checked by comparing the ratio of vector to pseudoscalar decay constant with the prediction of Heavy Quark Effective Theory in the limit of infinitely heavy quark mass. Good agreement is found. We then calculate the decay constant ratio for B mesons: $f_{B^*}/f_B= 1.01(0.01)(^{+0.04}_{-0.01})$. We also quote quenched $f_{B^*}=177(6)(17)$ MeV.

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