Can a neutral pion go to two electron anti electron pairs

[James1991]

Basically can a neutral pion go to two electrons and two positrons and under what interaction would it do this?

I know its defiantly not the strong force, so is it weak or EM? I'm pretty sure its EM but not 100%
Thanks

 

[fermi]

Basically can a neutral pion go to two electrons and two positrons and under what interaction would it do this?

I know its defiantly not the strong force, so is it weak or EM? I'm pretty sure its EM but not 100%
Thanks

Yes indeed this decay is observed with a branching ratio of 3.2E-5, which is consistent with being suppressed (relative to the two photon decay) by an approximate factor of \alpha^{2}, where \alpha is the fine structure constant. Based on this information alone you should be able to deduce that this decay is predominantly electromagnetic. (It turns out that it has an additional but totally negligible weak component which comes from Z mediation instead of photons.)