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arXiv · hep-ph/0110133

The D^0 -> K^0 \bar{K^0} decay beyond factorization

J. 0. Eeg·S. Fajfer·J. Zupan
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Abstract

The decay mode D^0 -> K^0 \bar{K^0} has no factorizable contribution. We calculate the nonfactorizable chiral loop contributions of order O(p^3)and then we use a heavy-light type chiral quark model to calculate nonfactorizable tree level terms, also of order O(p^3), proportional to the gluon condensate. Calculated chiral loops and the gluon condensate contributions are of the same order of magnitude as the experimental amplitude.

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J. 0. Eeg, S. Fajfer, J. Zupan. 2001-10-10. The D^0 -> K^0 \bar{K^0} decay beyond factorization. https://doi.org/10.1063/1.1435932

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