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Heavy Quark Effective Theory, Interpolating Fields and Bethe-Salpeter Amplitudes

F. Hussain, G. Thompson

hep-pharXiv:hep-ph/9407330

Abstract

We use the LSZ reduction theorem and interpolating fields, alongwith the heavy quark effective theory, to investigate the structure of the Bethe-Salpeter amplitude for heavy hadrons. We show how a simple form of this amplitude, used extensively in heavy hadron decay calculations, follows naturally upto O(1/M) from these field theoretic considerations.

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