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World's largest atom smasher could seed microscopic black holes - Livescience.com

World's largest atom smasher could seed microscopic black holes - Livescience.com

World's largest atom smasher could seed microscopic black holes - Livescience.com
Dec 04, 2020 1 min, 43 secs

The cosmos may be studded with black holes so tiny they could slip in between atoms, a wild new theory suggests.

We have four fundamental forces of nature (at least, that we know about so far): electromagnetism, strong force, weak force and gravity.

In this potential explanation for the weakness of gravity, the extra dimensions are so large that our universe is embedded in a much vaster, higher-dimensional bulk made of the extra dimensions.

In this story, gravity is actually very strong, but unlike the other forces (which are constrained to our 3D universe), gravity gets to roam freely among all the dimensions.

One way would be through the production of microscopic black holes.

But if the force of gravity is actually a lot stronger, we could easily overwhelm the other forces of nature and produce black holes?

If gravity is strong enough, we could already be manufacturing tiny black holes in the LHC right now.

These tiny black holes are not a cause for alarm — they would evaporate in less than 10^minus 27 seconds, transmuting into a shower of particles well before they did anything interesting like swallowing Earth.

But to date we haven't seen any of particle sprays suggestive of microscopic black holes or extra dimensions.

Previous calculations of how often the LHC would create microscopic black holes made some simple assumptions about how the black holes would form and how they would interact with the universe around them.

This group's more precise calculations reveal that, assuming all those extra dimensions exist and gravity is secretly superstrong, the LHC can produce far fewer microscopic black holes than we previously realized.

Depending on the number of hypothetical extra dimensions, the number of these teensy black holes could be as low as  one-tenth of the previous estimates.

And if a microscopic black hole does make an appearance in our data, it would mean that what we think of as the universe is just a small bubble embedded in a much larger framework — and we would have to completely rewrite our understanding of gravity.

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