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Bloch-Nordsieck Cancellations beyond Logarithms in Heavy Particle Decays

URN to cite this document:
urn:nbn:de:bvb:355-epub-139860
Beneke, M. ; Braun, Vladimir M. ; Zakharov, V. I.
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Date of publication of this fulltext: 12 Apr 2010 12:02



Abstract

We investigate the one-loop radiative corrections to the semileptonic decay of a charged particle at finite gauge boson mass. Extending the Bloch-Nordsieck cancellation of infrared logarithms, the two subsequent nonanalytic terms are also found to vanish after eliminating the pole mass of the decaying particle in favor of a mass defined at short distances. This observation justifies the operator ...

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