Hello. I was taught that a charge which changes its velocity must radiate (at least, in classical electrodynamics). Let's consider a charged particle which decays into another charged particle (and, maybe, others neutral particles; but not photons). In this case, can we find electromagnetic radiation? I found a particular example*, http://en.wikipedia.org/wiki/Bremsstrahlung#Beta_decay but I wonder if this a general feature of charged particle's decays. If this question is already answered in this forum, just tell me, and I will delete this thread. Thank you for your time :) Greetings *"The "inner" bremsstrahlung arises from the creation of the electron [...]" PS: My mother language is not English, so I'll be glad if you correct any mistake.