June 20, 2021

What happened to the first subject after the Big Bang?


The illustration shows the expansion of the Universe -Big Bang- which consisted of a Quark-Gluon plasma soup.

The illustration shows the expansion of the Universe -Big Bang- which consisted of a Quark-Gluon plasma soup.
EP

Researchers from the University of Copenhagen have investigated what happened to a specific type of plasma, the first matter to be present, during the first microsecond of the Big Bang.

Their findings provide a piece of the puzzle of the evolution of the universe, as we know it today, reports the Niels Bohr Institute. it’s a statement. About 14 billion years ago, our universe went from being much hotter and denser to radically expanding, a process that scientists have called the Big Bang. And while we know that this rapid expansion created particles, atoms, stars, galaxies, and life as we know it today, the details of how it all happened are still unknown.

Now, a new study by researchers at the University of Copenhagen reveals ideas on how it all started. “We have studied a substance called Quark-Gluon Plasma that it was the only matter, that existed during the first microsecond of the Big Bang. Our results tell us a unique story of how plasma evolved in the early stage of the universe.“explains You. Zhou, associate professor at the Niels Bohr Institute at the University of Copenhagen.

“First, the plasma consisting of quarks and gluons was separated by the hot expansion of the universe. Then the pieces of the quark were reformed into so-called hadrons. A hadron with three quarks produces a proton, which is part of the atomic nuclei. These cores are the building blocks that make up the earth, ourselves, and the universe around us. “, Add.

Quark-Gluon Plasma (QGP) was present in the first 0.000001 seconds of the Big Bang and then disappeared due to expansion. But by using the Large Hadron Collider at CERN, the researchers were able to recreate this first affair in history and trace what happened to it. “The collider crushes the ions in the plasma with great speed, almost like the speed of light. This allows us to see how QGP evolved from being its own matter to the nuclei of atoms and the building blocks of life,” says You. Zhou.

“In addition to using the Large Hadron Collider, the investigations also developed an algorithm that is capable of analyzing the collective expansion of more particles produced at the same time than ever before. Their results show that QGP used to be a fluid liquid form and that it distinguishes itself from other materials by constantly changing shape over time.

“For a long time, researchers thought that plasma was a form of gas, but our analysis confirms the latest milestone measurement, where the Hadron Collider showed that QGP was fluid and had a water-smooth texture. The new details that we provide is that the plasma has changed shape over time, which is quite surprising and different from any other subject we know and what we would have expected “says You Zhou.

Although this may seem like a small detail, it brings us one step closer to solving the puzzle of the Big Bang and how the universe developed in the first microsecond, he says. “Each discovery is a brick that improves our chances of uncovering the truth about the Big Bang. It has taken us about 20 years to discover that Quark-Gluon Plasma was fluid before it became hadrons and the building blocks of life. Therefore , our new knowledge about the ever-changing behavior of plasma is a breakthrough for us “You Zhou concludes.

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