Maybe we do not know what is dark matter, but we do know: it does not seem to have killed anyone by hitting them, an event that, at a minimum, would cause serious injuries.
Therefore, you can scratch it from the list of things that you should worry about in this worrying world. What is great and everything, but it was not the purpose of the pre-printed paper that describes these findings.
According to the physicists Jagjit Singh Sidhu and Glenn Starkman of Case Western Reserve University and Robert Scherrer of the University of Vanderbilt, the fact that no one has died of an impact on dark matter allows us to apply restrictions to the mysterious thing.
"Our results," they inform, "they open a new window on dark matter: the human body as a dark matter detector".
On the surface, this sounds like a beautiful science; For the moment, we can all read his article: entitled "Death By Dark Matter" – on the pre-printed web archive, until the scientific community and the peer review also give them a more attentive look.
Dark matter is still a thorn next to cosmology. We know that there is something that generates more gravity than can be explained by detectable matter. In fact, the way stars and galaxies move indicates that up to 85% of matter in the universe is this mysterious undetectable mass. Therefore, we call dark matter.
Researchers have some knee detectors looking for dark matter and have shown us some incredible things. But, to date, things have not been detected in themselves.
Another way to go looking for something is to find out what it is not. This is where you ask if dark matter crashed into people like mysterious bullets of ghost space could be a valuable question.
Macroscopic dark matter or macro in particular refers to candidates of dark matter that elastically scatter the normal matter through a broad geometrical cross section.
According to team calculations, they are particles of this dark matter, which are referred to as "macros", from which you would not want to be hit.
"The analogy closest to a macro collision with a human being is a bullet wound," writes the physicists.
"Keep in mind that we are working with a very different range of sizes and speeds of typical bulletproof shells. Macros tend to have hypersonic speeds, but very small geometrical cross sections in our range of interest parameters (so low as 1 micron)
"Therefore, it is probable that its destructive effect is qualitatively different from that of a bullet, in general, a macro impact heats up the cut tissue cylinder along its path to a temperature of 10 million Kelvin, resulting in a Plasma cylinder expanding into the body. "
It's okay yet Even using a much more conservative reference point for the effects – the energy of a rifle snout .22 -, macro-related deaths are not observed over a period of ten years in Europe, the United States, and Canada.
These results restrict macros that can be detected here on Earth below a physical size of a few microns and a mass of about 50 kilograms. The effect on the human body of macros smaller than that is not yet investigated, but this may also be limited in the future.
As for other candidates for dark matter, some have not yet explored; Although two separate documents have found that massive particles with weak interaction or WIMP, it is very unlikely that they cause cancer in humans.
We will remain asleep for this information.
The team document can be found on the pre-printed archive website.