%0 Journal Article
%T The QCD Scale in the Heavy Quark Expansion
%A Lisa Randall
%A Eric Sather
%J Physics
%D 1992
%I arXiv
%R 10.1103/PhysRevD.49.6236
%X We argue that consistency of the combined heavy quark and chiral effective lagrangian requires the QCD scale which multiplies $1/M$ in the heavy quark expansion to be the chiral symmetry breaking scale, $\Lambda_{CSB}$, rather than the QCD scale, $\Lambda_{QCD}$. This means that either there is large uncertainty in the accuracy with which the heavy quark effective theory can be applied to $c$ quarks or the cutoff scale of the heavy quark chiral effective theory is lower than has been assumed.
%U http://arxiv.org/abs/hep-ph/9211268v1