Quark- and Gluon-Condensate Contributions to Penguin Four-Fermi Operators
Mohammad R. Ahmady, Victor Elias
Abstract
The nonperturbative content of the QCD vacuum permits the occurrence of QCD-vaccum condensate contributions to penguin amplitudes. We calculate the dimension-4 <mq qq> and <αs G2> contributions to the effective Wilson coefficients for penguin four-Fermi operators, and discuss how such contributions may contribute to nonleptonic B decays.
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