Chiral perturbation theory for η→π0γγ
Summary, in English
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.
- Subatomic Physics
- ISSN: 0370-2693