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Matrix Elements of Four-quark Operators Relevant to Lifetime Difference Delta Gamma_(B_s) from QCD Sum Rules
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Matrix Elements of Four-quark Operators Relevant to Lifetime Difference \Delta \Gamma_{B_s} from QCD Sum Rules
classification
hep-ph
keywords
differenceelementsmatrixoperatorsrelevantrulesapproximationcompare
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We extract the matrix elements of four quark operators O_{L,S} relevant to the B_s and \bar B_s 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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