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Photo of Johan Bijnens

Johan Bijnens


Photo of Johan Bijnens

$\eta$ and $\eta'$ Physics


  • Johan Bijnens

Summary, in English

This talk describes the reasons why $\eta$ and $\eta^\prime$ decays are

an interesting topic of study for both theory and experiment. The main

part discusses the results of the recent calculation of $\eta\to3\pi$

at two-loop order in ChPT. Some puzzling aspects of the results

compared to earlier dispersive calculations are highlighted.

I also like to remind the reader of the use of $\eta$ and $\eta^\prime$ decays

for studying the anomaly.


  • Theoretical Particle Physics

Publishing year




Document type

Conference paper


  • Subatomic Physics