Towards a precision computation of f_Bs in quenched QCD

TL;DR

This paper computes the Bs meson decay constant in quenched QCD by combining static approximation data with interpolation near the charm mass, demonstrating a promising strategy for full QCD calculations.

Contribution

It introduces a novel approach that combines static approximation data with interpolation to estimate f_Bs in quenched QCD, paving the way for full QCD computations.

Findings

First step in demonstrating the feasibility of the interpolation strategy.

Separate continuum limit extrapolations for static and finite mass theories.

Provides preliminary results that will be refined in future work.

Abstract

We present a computation of the decay constant f_Bs in quenched QCD. Our strategy is to combine new precise data from the static approximation with an interpolation of the decay constant around the charm quark mass region. This computation is the first step in demonstrating the feasability of a strategy for f_B in full QCD. The continuum limits in the static theory and at finite mass are taken separately and will be further improved.