Charge asymmetry in K+- --> π+-γγinduced by the electromagnetic penguin operators

Details Charge asymmetry in K+- --> π+-γγinduced by the electromagnetic penguin operators Charge asymmetry in K+- --> π+-γγinduced by the electromagnetic penguin operators

2002-12-19

arxiv.org/abs/hep-ph/0212280v2

Phys.Rev. D67 (2003) 074028

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 10 pages, minor changes, Published version

Scientific paper

10.1103/PhysRevD.67.074028

The CP-violating charge asymmetry in decays K+- --> \pi+- \gamma\gamma, 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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