Nonfactorizable contributions to the decay mode D^0 -> K^0 \bar{K^0}

Details Nonfactorizable contributions to the decay mode D^0 -> K^0 \bar{K^0} Nonfactorizable contributions to the decay mode D^0 -> K^0 \bar{K^0}

2001-01-19

arxiv.org/abs/hep-ph/0101215v1

Phys.Rev. D64 (2001) 034010

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 8 figures

Scientific paper

10.1103/PhysRevD.64.034010

We point out that the decay mode D^0 -> K^0 \bar{K^0} has no factorizable contribution. In the chiral perturbation language, treating D^0 as heavy, the O(p) contribution is zero. We calculate the nonfactorizable chiral loop contributions of order O(p^3). 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. We find that both the chiral loops and the gluon condensate contributions are of the same order of magnitude as the experimental amplitude.

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