Charge asymmetry in K+- --> π+-γγinduced by the electromagnetic penguin operators
Dao-Neng Gao
Abstract
The CP-violating charge asymmetry in decays K+- --> π+- γγ, which is induced by the electromagnetic penguin operators, has been studied both in thestandard model and in its extensions. Because of a large enhancement of the Wilson coefficients of the electromagnetic penguin operators in the supersymmetric extensions of the standard model, a significant upper bound on this charge asymmetry could be expected, and thus high precision measurements of this interesting CP-violating quantity might explore new physics effects beyond the standard model.
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