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

2001/09/20 by C. Bernard, C. Bérnard, P. Williams +13 · 1 citation
Physics and Astronomy · #B meson #Constant (computer programming) #Exponential decay #Heavy quark effective theory #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Lattice constant #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pseudoscalar #Pseudovector #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Quenched approximation #hep-lat

paper · pdf · doi:10.1103/physrevd.65.014510

published as Phys.Rev.D65:014510,2002 · 11 pages, 3 postscript figs., revtex; two references added

arxiv created 2001/09/20 · openalex publication_date 2001/12/11 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

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 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)(_\ensuremath-0.01^+0.04). We also quote quenched f_B^*=177(6)(17) MeV.

Citations

• fB for various actions: approaching the continuum limit with dynamical fermions

Cited by

• Decay constants and form factors ofs-wave andp-wave mesons in the covariant light-front quark model