# What determines the distribution of the energy between the beta-particle and the neutrino in beta decay?

When beta-decay occurs an electron or a positron is emitted along a neutrino or an antineutrino. The energy spectrum of the beta particles is continuous because, as I read, the energy is shared between the two emitted bodies.

My question is: what determines the distribution of energy here? That is, what determines with how much energy each particle is emitted? And for that matter: why is this sharing of the energy continuous?

-
You require calculations regarding the weak force for this. Since you are trying to find out the energy given to each particle, the force acted upon each particle is required. For this, you need to consider the speed of the particles involved in the beta decay. –  Ring Spectra Jan 18 at 21:00