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Long-distance contribution to\(K^ + \to \pi ^ + v\bar v\) decay and O(p 4) terms in CHPTdecay and O(p 4) terms in CHPT

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Il Nuovo Cimento A (1971-1996)

Summary

We calculate the long-distance contribution to\(K^ + \to \pi ^ + v\bar v\) using chiral perturbation theory. The leading contribution comes from O(p4) tree terms. The branching ratio of the O(p4) long-distance contribution is found to be of order 10-3 smaller than the short-distance contribution.

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Authors and Affiliations

  1. “J. Stefan” Institute — Jamova 39, P.O. Box 3000, 1001 Ljubljana, Slovenia Research Institute for High Energy Physics, University of Helsinki, (Siltavuorenpenger 20 C), P.O. Box 9, FIN-00014, Helsinki, Finland

    S. Fajfer

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  1. S. Fajfer
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The author thanksM. Chaichian for very useful discussions and his hospitality in Helsinki. This work was supported in part by the Ministery of Science and Technology of the Republic of Slovenia.

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Fajfer, S. Long-distance contribution to\(K^ + \to \pi ^ + v\bar v\) decay and O(p 4) terms in CHPTdecay and O(p 4) terms in CHPT. Il Nuovo Cimento A (1971-1996) 110, 397–404 (1997). https://doi.org/10.1007/BF03035889

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  • DOI: https://doi.org/10.1007/BF03035889

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