The existence of tetraneutron is proven in the test.

  

 The existence of tetraneutron is proven in the test. 

"In the tandem Van de Graaff accelerator of the Maier-Leibnitz laboratory on the Garching research campus. A lithium-7 target has been bombarded with lithium-7 atomic nuclei. Those nuclei accelerated to around twelve percent of the speed of light. All measurement results indicate that carbon-10 and the sought-after tetra-neutron were formed. – Schematic representation of the nuclear reaction."

(https://www.chemeurope.com/en/news/1173903/the-tetra-neutron.html)

Tetraneutrons are groups of four neutrons. So could there be also tetra protons and tetra electrons? The groups of particles there is not antimatter. And how long do those particles stay in the form? If they exist.  In positronium electron and positron and protonium proton and antiproton. 

In those structures, the antimatter particle or mirror particle will keep the material particle orbiting each other. Could it be possible to make similar structures only by using protons and electrons in structures that are forming only electrons or protons?

Tetraneutron or hypothetical four neutron group is the element number "0". The tetraneutron would be the "neutron crystal" and the trivial name for that thing is neutronium. There is suspicion that neutronium existed in the neutron stars. 

The test has proven the existence of that strange element number "0" or neutronium. There are also other types of exotic materials or "elements". The name of those very interesting "pseudo-elements " protonium. In that synthetic element proton orbits antiproton. And that's why the name of the protonium is antiprotonic hydrogen. In positronium, the electron and positron are orbiting each other. 

Neutronium is the only of those elements that contain only material. But if there is possible to form the tetraneutron type structures by using only protons and electrons without antimatter.  That thing will bring a new state of matter. The names of those hypothetical proton and electron groups could be tetra protons and tetra electrons. 

And there are made calculations that tetraneutron can stay stable for about seven minutes. That means tetraneutron is a quite long existent element if we compare that thing with the Higgs boson or some super heavy elements which half time is less than second. 

Tetraneutron has given an idea of one of the most interesting visions about the state of matter. In that state of matter, the tetraneutrons are replacing neutrons. If there are similar hypothetical groups of protons called "tetra protons" like tetraneutrons. That thing can make it possible to make the new fundamental state of matter. In that hypothetical "tetra state" of matter, the protons and neutrons are in the form of groups in the nucleus. 

And the electron groups are in the places where normal electrons are orbiting the nucleus. That thing means that this state of matter can have a similar number of tetraneutrons and tetra protons with electron groups as the regular atoms have single neutrons and protons. 

Those kinds of theoretical atoms are interesting things. But the fact is that the tetra neutrons are interesting tools. They can use as miniature gramophone stylus in the tunneling microscopes. But the problem is that neutrons are harder to produce than protons and electrons. That means benefiting this thing requires nuclear reactors. 

https://www.chemeurope.com/en/news/1173903/the-tetra-neutron.html

https://www.techexplorist.com/tetraneutron-experiment-offers-evidence-long-sought-particle-comprising-four-neutrons/43130/

https://en.wikipedia.org/wiki/Neutronium

https://en.wikipedia.org/wiki/Positronium

https://en.wikipedia.org/wiki/Protonium

https://thoughtsaboutsuperpositions.blogspot.com/