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Renormalons and the heavy quark effective theory

G. Martinelli
(
- CERN
)
,
Christopher T. Sachrajda
(
- Southampton U.
)

Feb, 1995

17 pages

Published in:

Phys.Lett.B 354 (1995) 423-434

e-Print:

hep-ph/9502352 [hep-ph]

DOI:

10.1016/0370-2693(95)00660-D

Report number:

CERN-TH-7517-94,
SHEP-94-95-13

View in:

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Abstract:

We propose a non-perturbative method for defining the higher dimensional operators which appear in the Heavy Quark Effective Theory (HQET), such that their matrix elements are free of renormalon singularities, and diverge at most logarithmically with the ultra-violet cut-off. Matrix elements of these operators can be computed numerically in lattice simulations of the HQET. We illustrate our procedures by presenting physical definitions of the binding energy (\lb) and of the kinetic energy (-

\lambda_1/2m_Q

) of the heavy quark in a hadron. This allows us to define a ``subtracted pole mass", whose inverse can be used as the expansion parameter in applications of the HQET.

Note:

18 pages, LaTeX, no figures

HQET model: operator
quark: propagator
quark: mass
mass: quark
binding energy
quantum chromodynamics: perturbation theory
operator: higher-dimensional
nonperturbative
lattice field theory

References(23)

Figures(0)

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