# Forces involved in particle decays

1. Apr 12, 2010

### Cakey

Hey

I'm getting muddled deciding which forces are responsible in individual particle decays.

I'm looking at the hyperphysics page: http://hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html

Here it says that the photon mediates the EM force. So does that mean that if photons are produced after a decay, the EM force was involved?

Then it says that the strong force is mediated by gluons and $$\pi$$ (nucleons), which I assume means pions(??). So if there are pions involved in a decay, the strong force must be involved?

I'm confused because I don't think it can be this straightforward, given that you get decays involving pions and photons.