Study of Long Distance Contributions to $K\to nπν\barν$

Details Study of Long Distance Contributions to $K\to nπν\barν$ Study of Long Distance Contributions to $K\to nπν\barν$

1996-04-03

arxiv.org/abs/hep-ph/9604228v1

Phys.Rev. D54 (1996) 877-881

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, LaTeX file

Scientific paper

10.1103/PhysRevD.54.877

We calculate long distance contributions to $K\to\pi\nu\bar{\nu}\,,\ \pi\pi\nu\bar{\nu}$, and $\pi\pi\pi\nu\bar{\nu}$ modes within the framework of chiral perturbation theory. We find that these contributions to decay rates of $K\to \pi\nu\bar{\nu}$ and $K\to \pi\pi\nu\bar{\nu}$ in the chiral logarithmic approximation are at least seven orders of magnitude suppressed relative to those from the short distance parts. The long distance effects in this class of decays are therefore negligible.

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