Heavy flavour precision physics from Nf = 2 + 1 + 1 lattice simulations

TL;DR

This paper reports high-precision lattice QCD calculations of decay constants and quark masses in the charm and bottom sectors, using Nf=2+1+1 dynamical quark configurations with near-physical parameters.

Contribution

It provides the first high-precision lattice results for pseudoscalar decay constants and bottom quark mass ratios using Nf=2+1+1 simulations with near-physical quark masses.

Findings

Precise decay constants for charmed pseudoscalar mesons.

Determination of bottom quark mass and ratio to charm.

Simulations at multiple lattice spacings and near-physical pion masses.

Abstract

We present precision lattice calculations of the pseudoscalar decay constants of the charmed sector as well as determinations of the bottom quark mass and its ratio to the charm quark mass. We employ Nf=2+1+1 dynamical quark gauge configurations generated by the European Twisted Mass Collaboration, using data at three values of the lattice spacing and pion masses as low as 210 MeV. Strange and charm sea quark masses are close to their physical values.