The process η → π0π0γγ is discussed in Chiral Perturbation Theory (ChPT). Special attention is devoted to one-loop corrections, η-η1 mixing effects and vector-meson dominance of ChPT counter-terms. The less interesting η → π+π- transition is briefly discussed too. © 1997 Elsevier Science B.V.
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 15 May 1997|