Matrix Elements of Four-quark Operators Relevant to Lifetime Difference Bs from QCD Sum Rules
Abstract
We extract the matrix elements of four quark operators OL,S relevant to the Bs and Bs life time difference from QCD sum rules. We find the vacuum saturation approximation works reasonably well, i.e., within 10%. We discuss the implications of our results and compare them with the recent lattice QCD determination.
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