QCD sum rules calculation of heavy Λ semileptonic decay
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Data
1998-07-09
Autores
Dosch, H. G.
Ferreira, E.
Nielsen, M.
Rosenfeld, R. [UNESP]
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Elsevier B.V.
Resumo
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 Λc decay we obtain a reasonable agreement with experiment. For the Λb semileptonic decay we find at the zero recoil point a violation of the heavy quark symmetry of about 20%. © 1998 Published by Elsevier Science B.V. All rights reserved.
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Physics Letters B. Amsterdam: Elsevier B.V., v. 431, n. 1-2, p. 173-178, 1998.