Abstract
The existing derivations of a heavy quark effective theory (HQET) are presented from a unified point of view. It is shown that a correct normalization of the heavy quark field in the effective theory is crucial for making explicit the mass dependence of the matrix elements. A possible variant of HQET which satisfies this requirement and which is constructed from a sequence of Foldy-Wouthuysen transformations is presented. The renormalization of the resulting effective Lagrangian to order 1/m2 is performed including also effects arising from vacuum polarization.
Original language | English |
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Pages (from-to) | 499-527 |
Number of pages | 29 |
Journal | Nuclear Physics B |
Volume | 428 |
Issue number | 1-2 |
DOIs | |
State | Published - 10 Oct 1994 |