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Recent progress on HQET lagrangian

A. G. Grozin

hep-pharXiv:hep-ph/9711269

Abstract

HQET lagrangian up to 1/m3 terms is discussed. Consequences of reparameterization invariance are considered. Results for the chromomagnetic interaction coefficient at two loops, and in all orders in the large--β1 approximation, are presented.

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