Chiral perturbation theory for η→π0γγ

Ll Ametller, J. Bijnens, A. Bramon, F. Cornet

Research output: Contribution to journalArticleResearchpeer-review

74 Citations (Scopus)


The η→π0γγ decay amplitude is discussed in the general context of chiral perturbation theory assuming that the low-energy constants (counterterms) are saturated by the known meson resonances. The suppression of the lowest order contributions is understood in physical terms. A reasonable agreement with the experimental decay width is achieved. © 1992.
Original languageEnglish
Pages (from-to)185-190
JournalPhysics Letters B
Issue number1-2
Publication statusPublished - 6 Feb 1992


Dive into the research topics of 'Chiral perturbation theory for η→π<sup>0</sup>γγ'. Together they form a unique fingerprint.

Cite this