Infrared Renormalization-Group Flow for Heavy-Quark Masses
Journal Article
·
· Physical Review Letters
- Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) Foehringer Ring 6, 80805 Muenchen (Germany)
- Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
- Departamento de Fisica Teorica II, Universidad Complutense de Madrid, 28040 Madrid (Spain)
A short-distance heavy-quark mass depends on two parameters: the renormalization scale {mu} and a scale R controlling the absorption of infrared fluctuations. The radius for perturbative corrections that build up the mass beyond its pointlike definition in the pole scheme is {approx}1/R. Treating R as a variable gives a renormalization-group equation. R evolution improves the stability of conversion between short-distance mass schemes, allowing us to avoid large logs and the renormalon. R evolution can also be used to study IR renormalons without using bubble chains, yielding a convergent sum rule for the coefficient of the O({lambda}{sub QCD}) renormalon ambiguity of the pole mass.
- OSTI ID:
- 21179790
- Journal Information:
- Physical Review Letters, Vol. 101, Issue 15; Other Information: DOI: 10.1103/PhysRevLett.101.151602; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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