Neutrino decay before electroweak breaking

[Helena Wells]

TL;DR Summary

Neutrinos don't likely get their mass from the Higgs field.Before the electroweak breaking all other particles were massless but neutrinos shouldn't be massless.

Most scientists believe neutrinos don't get their mass from the Higgs field due to their tiny mass compared to the next lightest particle(electron).During the electroweak epoch the rest particles were massless but neutrinos shouldn't be.

The neutrinos would then decay to the other massless ( i guess if the electroweak interaction had some of the properties of the weak interaction)
particles.

How old can neutrinos be in the current state they are? When was their assosciate mass field turned on?

 

[Vanadium 50]

Neutrinos don't likely get their mass from the Higgs field.

Nobody knows that. They might.

Before the electroweak breaking all other particles were massless

Nobody knows that either. What is known for certain is that in the early universe the particles' rest masses were small compared to their energies so mass was irrelevant.

The neutrinos would then decay to the other massless ...particles

Unlikely. If there were a phase transition, it would occur on a very short time scale, much shorter than any neutrino lifetime. (Indeed, likely lifetimes would be loinger than the present age of the universe)