Heavy quark effective theory beyond perturbation theory: renormalons, the pole mass and the residual mass term

URN to cite this document:: urn:nbn:de:bvb:355-epub-139885
DOI to cite this document:: 10.5283/epub.13988

Beneke, M. ; Braun, Vladimir M.

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Date of publication of this fulltext: 12 Apr 2010 12:03

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Abstract

We study the asymptotic behaviour of the perturbative series in the heavy quark effective theory (HQET) using the 1/Nƒ expansion. We find that this theory suffers from an ultraviolet renormalon problem, corresponding to a non-Borel-summable behaviour of perturbation series in large orders, and leading to a principal nonperturbative ambiguity in its definition. This ambiguity is related to an ...