In Neutron Decay, where is the Positron?
Looking at standard diagrams for Free Neutron Decay, it expels an Electron and an Electron Antineutrino. Neutrons are supposed to be 2 down-1 up quark though, and in an unstable nucleus a Proton can "eat" an Electron to become a Neutron. (there is also rare Proton Decay, where a Positron and Neutrino are ejected to become a Neutron, but thats radioactive stuff)
So, in theory, isnt the Neutron creating an Electron to let off excess energy? where is the Positron?
or, even stranger, do we potentially have the structure of a Neutron incorrect? Ive tried googling this for weeks and never find any discussion on this part of the topic(or the positron question). Please help me out here