Does a 'Mirror World of Particles' Explain the Crisis in Cosmology? - by BrianKoberlein
A mirror of our world in the stars. Credit: Beate Bachmann, via Pixabay
Wild ideas tend to fall in and out of popularity in theoretical physics. The mirror universe idea is no exception. It was studied quite a bit back in the 1990s as a way to deal with the problem of matter-antimatter symmetry. We can create matter particles in the lab, but when we do, we also create antimatter particles. They always come in pairs. So when particles formed in the early universe, where did all their antimatter siblings go? One idea was that the universe itself formed as a pair.
It should be pointed out that this study is mostly a proof of concept. It lays out how this cosmic invariance might solve the Hubble constant problem, but doesn’t go so far as to prove it’s a solution. A more detailed model will be needed for that. But it’s an interesting idea. And it’s good to know that if your evil doppelganger is out there, they can only influence your life gravitationally…
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