Lattice results for the decay constant of heavylight vector mesons
Abstract
We compute the leptonic decay constants of heavylight 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 an 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.
 Publication:

Physical Review D
 Pub Date:
 January 2002
 DOI:
 10.1103/PhysRevD.65.014510
 arXiv:
 arXiv:heplat/0109015
 Bibcode:
 2002PhRvD..65a4510B
 Keywords:

 12.38.Gc;
 13.20.v;
 Lattice QCD calculations;
 Leptonic semileptonic and radiative decays of mesons;
 High Energy Physics  Lattice
 EPrint:
 11 pages, 3 postscript figs., revtex