Chiral perturbation theory predictions for η → π+π-π0γ

A. Bramon, P. Gosdzinsky, S. Tortosa

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)


The η → π+π-0γ decay is discussed in the general context of Chiral Perturbation Theory (ChPT), assuming that the low-energy constants (counterterms) are saturated by vector-meson resonances. The η → π+π-Tr0γ amplitude can be separated in two distinct pieces: the inner bremsstrahlung, A(IB), and the structure dependent (or direct emission), A(SD), amplitudes. The former - which essentially contains the same physics as A(η → π+π-π0) - is found to dominate over the second one - which looks more interesting from the ChPT point of view.
Original languageEnglish
Pages (from-to)140-146
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-3
Publication statusPublished - 6 Jun 1996


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