QCD Sum Rules Calculation of Heavy $\Lambda$ Semileptonic Decay

Abstract

We set up sum rules for heavy lambda decays in a full QCD calculation which in the heavy quark mass limit incorporates the symmetries of heavy quark effective theory. For the semileptonic $\La_c$ decay we obtain a reasonable agreement with experiment. For the $\La_b$ semileptonic decay we find at the zero recoil point a violation of the heavy quark symmetry of about 20%.

Revised version. Title changed. 11 pages (RevTex), 4 PS figures

References in corpus (2)

• Heavy Baryon Transitions in a Relativistic Three-Quark Model
• Theory of Beauty Lifetimes

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