Long distance contribution to $K^+ \to \pi^+ \nu {\bar \nu}$ decay and $O(p^4)$ terms in CHPT
Long distance contribution to $K^+ \to \pi^+ \nu {\bar \nu}$ decay and $O(p^4)$ terms in CHPT
The long distance contribution to $K^+ \to \pi^+ \nu {\bar \nu} $ is calculated using chiral perturbation theory. The leading contribution comes from $O(p^4)$ tree terms. The branching ratio of the $O(p^4)$ long distance contribution is found to be of order $10_{-3}$ smaller than the short distance contributions.
S. Fajfer
物理学
S. Fajfer.Long distance contribution to $K^+ \to \pi^+ \nu {\bar \nu}$ decay and $O(p^4)$ terms in CHPT[EB/OL].(1996-02-15)[2025-08-02].https://arxiv.org/abs/hep-ph/9602322.点此复制
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