# The 35th International Symposium on Lattice Field Theory

18-24 June 2017
Palacio de Congresos
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# Contribution Parallel

Andalucía I
Weak Decays and Matrix Elements

# Charmed and bottom pseudoscalar meson decay constants and quark masses $m_b$ and $m_c$ from HISQ simulations

## Content

We present results for the decay constants $f_B$ and $f_{B_s}$ and update our earlier determinations of $f_D$ and $f_{D_s}$. We employ HISQ ensembles with 2+1+1 flavors generated at six lattice spacings, including five with physical light-quark masses. Calculations are carried out with several heavy valence-quark masses ranging from near charm to bottom (at the finest lattice spacing). In addition to the decay constants, we present results for charm- and bottom-quark masses extracted from heavy-light meson masses using an approach based on HQET and employing the renormalon-subtracted (RS) mass as an intermediate quantity. We also present our results for the HQET parameters $\bar\Lambda$ and $\mu_\pi^2$ in the RS scheme.

## Preferred track (if multiple tracks have been selected)

Weak Decays and Matrix Elements