95 research outputs found
On the short distance nonperturbative corrections in heavy quark expansion
We study the corrections due to renormalons to the heavy hadron decay
width.The renormalons contribution estimated in terms of finite gluon mass
based on the assumption that the gluon mass represents the short distance
nonperturbative effects in the standard OPE (and hence in the heavy quark
expansion). We found that the corrections are about 10% of the leading decay
rate. We point out the implications for the assumption of quark-hadron duality
in heavy quark expansion.Comment: 4 pages, epscrc2 style, LATTICE 2000 (Heavy Quark Physics), Version
to appear in Nucl. Phys. B (PS
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