Heavy-light decay constants with three dynamical flavors

TL;DR

This paper reports preliminary findings on heavy-light decay constants with three dynamical flavors, showing a significant increase in f_B compared to quenched calculations, using improved lattice actions.

Contribution

It introduces new lattice QCD results for heavy-light decay constants with three dynamical flavors using improved actions and valence quarks.

Findings

f_B increases by ~23% with three dynamical flavors

Discretization errors are small in quenched case

Dynamical case errors not yet measured

Abstract

We present preliminary results for the heavy-light leptonic decay constants in the presence of three light dynamical flavors. We generate dynamical configurations with improved staggered and gauge actions and analyze them for heavy-light physics with tadpole improved clover valence quarks. When the scale is set by $m_\rho$, we find an increase of approximately 23% in $f_B$ with three dynamical flavors over the quenched case. Discretization errors appear to be small (of order 3% or less) in the quenched case but have not yet been measured in the dynamical case.