Description:
<jats:title>A<jats:sc>bstract</jats:sc>
</jats:title>
<jats:p>Heavy Quark Effective Theory (HQET) computations of semi-leptonic decays, e.g. <jats:italic>B</jats:italic> → π<jats:italic>l</jats:italic>ν, require the knowledge of the parameters in the effective theory for all components of the heavy-light flavor currents. So far non-perturbative matching conditions have been employed only for the time component of the axial current. Here we perform a check of matching conditions for the time component of the vector current and the spatial component of the axial vector current up to one-loop order of perturbation theory and to lowest order of the 1<jats:italic>/m</jats:italic>-expansion. We find that the proposed observables have small higher order terms in the 1<jats:italic>/m</jats:italic>-series and are thus excellent candidates for a non-perturbative matching procedure.</jats:p>