Chiral perturbation theory for η→π0γγ

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

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72 Citations (Scopus)

Abstract

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
Volume276
Issue number1-2
DOIs
Publication statusPublished - 6 Feb 1992

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