Is Dark Matter Coming From The Fifth Dimension?

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We’ve searched for dark matter in various places without success. So, why we don’t try the fifth dimension of spacetime?

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Image by Tomislav Jakupec from Pixabay

American physicists Raman Sundrum and Lisa Randall proposed variants of a model of the Universe now called the Randall-Sundrum model of spacetime back in 1999. In this model our Universe is 5-dimensional and all particles with the exception of gravitons are in branes. Since then, physicists have been examining the sill popular Randall-Sundrum model from all sides but it is still just a hypothesis.

Now, Adrian Carmona from the Universidad de Granada and his coworkers decided to use this model to explain the ever so mysterious dark matter problem that as you probably know still escapes our understanding. From what we know, dark matter affects our Universe through gravity but doesn’t interact with any other of the known fundamental forces. That suggests it should have some special properties we are still not understanding.

But that’s not the only problem of modern physics. Carmona and his colleagues say that particle physics has still a lot to uncover. Such as the hierarchy problem that is caused by the dramatic differences between the weak force and gravity as scientists still don’t know why the weak force (ironic name) is 10 to the power of 24 times stronger than gravity. There’s just no apparent reason for it.

In their recently published study, the researchers used the Randall-Sundrum model and fermions (particles with a half-digit spin) that pass through the fifth dimension creating the phenomenon we observe as dark matter through the creation of fermion dark matter inside of the fifth dimension. According to Carmona and his team fermions traveling through dimensions could at least partially explain dark matter as we still do not have an ideal candidate for it leaving the door opened for new kinds of physics.

But how could we check this theory? It seems that fermion dark matter could be tracked down by a suitable detector and the technology could be within our grasp.

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