Re: What composes the mass of an electron?

Another curiosity happening in the first 20' of the big bang theory,
currently accepted: the charge e of an electron.
1. Only neutrons and protons exist:
Neutrons: 3 udd quarks (2/3 e - 1/3 e - 1/3 e = 0 e)
Protons: 3 uud quarks (2/3 e + 2/3 e - 1/3 e = + 1 e)
2. When neutrons decay (20'): 1 Proton + (-1 e)
Numbers don't make sense.
Is that electrons are formed by three ddd quarks plus gluons, because
somehow a neutral +1/3 e + (-1/3 e) is created from nowhere during the
decay process, so 1 proton + 1 electron can appear?
I dismissed neutrinos, but one electron neutrino split in two parts with
opposite charges +/- 1/3 and zero mass? The rest is derived from gluons.
https://www.quantumdiaries.org/wp-content/uploads/2014/03/2000px-Standard_Model_of_Elementary_Particles.svg_.jpg