A theory is announced that the origin of dark matter is another world where matter was not formed, the ``dark mirror universe''



Although dark matter has a great influence on the state of the universe, such as the formation of galaxies,

dark matter does not interact with other matter and cannot be seen with the naked eye, and is shrouded in mystery. There are theories that it is a particle from another dimension, and even that it does not exist in the first place. A newly published study proposes a theory that dark matter is actually another universe that is a mirror image of our world.

[2401.12286] A Closer Look in the Mirror: Reflections on the Matter/Dark Matter Coincidence
https://arxiv.org/abs/2401.12286

There may be a 'dark mirror' universe within ours where atoms failed to form, new study suggests | Live Science
https://www.livescience.com/space/cosmology/there-may-be-a-dark-mirror-universe-within-ours-where-atoms-failed-to-form-new-study-suggests

Dark Matter May Be a Deformed Mirror Universe, Scientists Say
https://futurism.com/the-byte/dark-matter-mirror-universe

In a paper published on the preprint server arXiv in January 2024, a research team led by Arci Bodas of the Enrico Fermi Institute at the University of Chicago found that there are two strange coincidences in the universe. pointed out.



The first coincidence is that the amount of normal matter and dark matter in the universe is almost the same. It is estimated that the amount of dark matter is about five times that of normal matter, but

dark energy accounts for about 70% of all mass and energy in the universe, and dark matter and normal matter are In total, they are a minority of only about 30%, so this is not a big difference in the world of astrophysics.

The second coincidence is that the neutrons and protons that make up atoms have almost the same mass. Atoms of ordinary visible matter are made up of an atomic nucleus and electrons orbiting around it, and the atomic nucleus is made up of neutrons and protons, which have approximately equal masses. If the masses of the neutron and proton were significantly different, the atom would quickly become unstable and collapse, leaving behind a free-floating neutron.

Due to the symmetry that the abundance is almost the same even though the physical behavior is very different, the research team says, ``Every physical interaction in ordinary matter has a mirror of the dark matter world that reflects it.'' I assumed that there is.



This mirror model is based on the theory that dark matter may interact with each other and that dark matter may have its own periodic table of elements , but the researchers believe that the interaction between dark matter is quite small. I'm pointing it out. This is because if dark matter has complex interactions with each other, it would be much more likely to aggregate and form clumps than currently thought.

This suggests that most dark matter exists as a simple ocean of neutrons. In other words, the research team suggests that dark matter protons may evaporate in a scenario different from that of normal matter, and the 'sea of dark matter neutrons' left behind may be the true identity of objects currently recognized as dark matter. I did.

In the early universe, the first elements were created through nucleosynthesis of ordinary matter. If the theory proposed by the research team is correct, nucleosynthesis would occur in the same way in a mirrored world made of dark matter. Then, during the chaotic period at the beginning of the universe, the two worlds may have met and influenced each other.

Although the paper published by the research team has not been peer-reviewed, it is hoped that future studies that carefully observe the rate at which elements are created may be able to verify the existence of a mirrored world full of dark matter. Masu.

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