Running couplings for the simultaneous decoupling of heavy quarks
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Elsevier B.V.
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Article
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Abstract
Scale-invariant running couplings are constructed for several quarks being decoupled together, without reference to intermediate thresholds. Large-momentum scales can also be included. The result is a multi-scale generalization of the renormalization group applicable to any order. Inconsistencies in the usual decoupling procedure with a single running coupling can then be avoided, e.g., when cancelling anomalous corrections from t, b quarks to the axial charge of the proton. (c) 2006 Elsevier B.V. All rights reserved.
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Keywords
renormalization group, thresholds, mass logarithms, matching conditions, axial anomaly
Language
English
Citation
Physics Letters B. Amsterdam: Elsevier B.V., v. 634, n. 2-3, p. 249-254, 2006.
