Light Higgs particle in decays of K and η mesons

H. Leutwyler, M. A. Shifman

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We present a complete theoretical analysis of the decay amplitude K → πH and η → πH, where H is a hypothetical light Higgs particle. The analysis is based on the consistent use of the effective chiral lagrangian technique. In the K → πH transition the so-called "second constant" - the last undetermined part of the amplitude - is evaluated. Its contribution is shown to be relatively small and not important numerically. The η → πH amplitude is of order p4. We demonstrate that it is reliably calculable in terms of low-energy constants which are known from the phenomenology of the Goldstone mesons.

Original languageEnglish (US)
Pages (from-to)369-397
Number of pages29
JournalNuclear Physics, Section B
Issue number2
StatePublished - Oct 22 1990

Bibliographical note

Funding Information:
* Work supported in part by Schweizerischer Nationalfonds. **On leave of absence from the Institute of Theoretical and Experimental Physics, Moscow 117259,


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