Matching QCD and HQET heavy-light currents at three loops - INSPIRE

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Matching QCD and HQET heavy-light currents at three loops

S. Bekavac
(
- KIT, Karlsruhe
)
,
A.G. Grozin
(
- KIT, Karlsruhe and
- Novosibirsk, IYF
)
,
P. Marquard
(
- KIT, Karlsruhe
)
,
J.H. Piclum
(
- Alberta U.
)
,
D. Seidel
(
- Alberta U.
)

Nov, 2009

23 pages

Published in:

Nucl.Phys.B 833 (2010) 46-63

e-Print:

0911.3356 [hep-ph]

DOI:

10.1016/j.nuclphysb.2010.02.025

Report number:

TTP09-41,
SFB-CPP-09-110,
ALBERTA-THY-16-09

View in:

ADS Abstract Service

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Abstract: (Elsevier)

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.

Note:

23 pages, full results are available as Mathematica files at http://www-ttp.particle.uni-karlsruhe.de/Progdata/ttp09/ttp09-41/ / v2: an error in comparison with Ref. [8] fixed / v3: Journal version

Heavy Quark Effective Theory
Radiative corrections
B: decay constant
quantum chromodynamics
HQET model
correction: higher-order
quark: current
decay constant: ratio
vertex function
quark: massless

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)
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)
,
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)
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