Role of Four-Quark Operators in the Inclusive Λb Decays
P. Colangelo, F. De Fazio
Abstract
We compute by QCD sum rules the matrix elements of the relevant four-quark operators appearing in the expression of the Λb inclusive decay rates at the order 1/mb3. The results suggest that 1/mb3 corrections are not responsible of the observed difference between the lifetime of Λb and Bd.
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