Did Neutrinos Stop The Early Universe From Annihilating Itself?

We can create matter from energy in the lab. Particle accelerators do this all the time. When we do, half of what is created is matter and the other half antimatter.

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Tau.Neutrino said:

Did Neutrinos Stop The Early Universe From Annihilating Itself?

We can create matter from energy in the lab. Particle accelerators do this all the time. When we do, half of what is created is matter and the other half antimatter.

more…

> one idea is that chirality affects neutrino mass through a process known as the seesaw mechanism. In this model, right-handed neutrinos and left-handed anti-neutrinos exist, but their masses are so large we don’t see them in typical particle interactions.

Speculative, but it sounds familiar from somewhere.

https://en.wikipedia.org/wiki/Seesaw_mechanism

Um, all I get out of that is that the seesaw mechanism is an extension of the standard model

> a light neutrino, for each of the three known neutrino flavors, and a corresponding very heavy neutrino for each flavor, which has yet to be observed

Is this a minimal extension of the standard model? Not requiring supersymmetry or a GUT? If not, then it has a chance of being right.

> the only force they know to act on neutrinos is the weak force, and the weak force acts only on left-handed particles. Right-handed neutrinos might not interact with any of the known forces.

So far so good.

> right-handed neutrinos would be too massive to be stable in our universe

Oh dear. Then scrap that idea.