Matching QCD and HQET heavy-light currents at three loops

We consider the currents formed by a heavy and a light quark within Quantum Chromodynamics and compute the matching to Heavy Quark Effective Theory to three-loop accuracy. As an application we obtain the third-order perturbative corrections to ratios of B-meson decay constants.

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Bibliographic Details
Published inarXiv.org
Main Authors Bekavac, S, Grozin, A G, Marquard, P, Piclum, J H, Seidel, D, Steinhauser, M
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 07.03.2010
Subjects
Decay rate
Matching
Particle decay
Physics - High Energy Physics - Phenomenology
Quantum chromodynamics
Quantum theory
Quarks
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Summary:We consider the currents formed by a heavy and a light quark within Quantum Chromodynamics and compute the matching to Heavy Quark Effective Theory to three-loop accuracy. As an application we obtain the third-order perturbative corrections to ratios of B-meson decay constants.
Bibliography:TTP09-41, SFB/CPP-09-110, Alberta Thy 16-09
ISSN:2331-8422
DOI:10.48550/arxiv.0911.3356