Long distance contribution to $K^+ \to π^+ ν{\bar ν}$ decay and $O(p^4)$ terms in CHPT

Details Long distance contribution to $K^+ \to π^+ ν{\bar ν}$ decay and $O(p^4)$ terms in CHPT Long distance contribution to $K^+ \to π^+ ν{\bar ν}$ decay and $O(p^4)$ terms in CHPT

1996-02-15

arxiv.org/abs/hep-ph/9602322v1

Nuovo Cim. A110 (1997) 397-404

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 1 figure (available upon request)

Scientific paper

10.1007/BF03035889

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.

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