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Paper detail

Matching functions for heavy particles

We introduce matching functions as a means of summing heavy-quark logarithms to any order. Our analysis is based on Witten's approach, where heavy quarks are decoupled one at a time in a mass-independent renormalization scheme. The outcome is a generalization of the matching conditions of Bernreuther and Wetzel: we show how to derive closed formulas for summed logarithms to any order, and present explicit expressions for leading order and next-to-leading order contributions. The decoupling of heavy quarks in theories lacking asymptotic freedom is also considered.

preprint2003arXivOpen access
S. D. BassR. J. CrewtherF. M. SteffensA. W. Thomas
hep-ph
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S. D. BassR. J. CrewtherF. M. SteffensA. W. Thomas

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