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

E. Ferreira (UFRJ-Brazil); H.G. Dosch (U.Heidelberg); M. Nielsen (USP-Brazil); R. Rosenfeld (IFT-Brazil)

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

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arxiv hep-ph/9712350 v2 pith:TMQPJURJ submitted 1997-12-11 hep-ph

H.G. Dosch (U.Heidelberg) , E. Ferreira (UFRJ-Brazil) , M. Nielsen (USP-Brazil) , R. Rosenfeld (IFT-Brazil) This is my paper · ORCID

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keywords heavydecayquarksemileptoniccalculationlambdarulesagreement

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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%.

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