Chapter 944 Dark matter stars? This is impossible!
Void field theory, hot dark matter, warm dark matter, cold dark matter.
Dark matter oscillates, transforms, and decays.
Large-mass dark matter will be torn into small- and medium-mass dark matter, and eventually transformed into dark matter particles that cannot decay
A series of concepts are constantly impacting everyone in the conference room's understanding of dark matter.
Although many of these theories are based on previous speculations or observations about dark matter in the physics community, there are also many that have not been heard before, or are not very mainstream ideas.
For example, the way dark matter decays, of course, Professor Xu calls it dark matter transition.
For example, large-mass dark matter will tear out secondary or sub-level low-mass dark matter particles, etc.
These views are undoubtedly novel to today's physics community.
While it brought new theories, it also had varying degrees of impact on the hearts of most people present.
Of course, for the many physicists who can sit here today, they are definitely the most receptive to new theories.
After all, the development of cutting-edge theoretical physics, from hundreds of years ago during the Renaissance to today, has been facing various unknowns and changes.
Those scholars who cannot keep up with the times have already ended up in the dust of history, and they are even less likely to create a new world.
In the conference room, Witten jotted down some key information points in the blank spaces of the report document with interest, then looked at Xu Chuan and asked.
“According to your description, it is indeed a feasible method to identify dark matter particles of different mass levels through collider. But the problem is that we currently don’t know much about dark matter particles, including the energy levels at which they may appear. .”
"In this case, it may be very difficult to distinguish which dark matter particles are the dark matter particles from the vast background cluttered data."
"Do you have any solution to this problem?"
Hearing this question, Xu Chuan shrugged and said: "As for the issue of energy level channels where multiple types of dark matter particles appear, I currently have no way of knowing."
"After all, for an advanced theory, it must always be verified by experiments. No theory can be put forward to know the results, especially in this most cutting-edge field of theoretical physics, our understanding of dark matter Not much is known.”
Witten nodded and had no objection to Xu Chuan's statement.
Indeed, no predictive theory can be verified the first time it is proposed.
Just like his string theory, there is still no hope of verification so far.
At least, in comparison, the void field and dark matter theory established by his student has a chance to be further verified.
After thinking for a while, he remembered another thing, looked at Xu Chuan with interest, and asked curiously.
"The collider is indeed the most direct and fastest way to verify dark matter particles at present, but I remember you just said there is another way to verify it. What is it?"
Hearing this, other scholars in the conference room also turned their gazes over.
For microscopic substances like dark matter particles, apart from scientific research equipment such as the Large Strong Particle Collider, there are very few other detection methods.
Xu Chuan smiled and said: "Dark Star!"
Dark Star? Upon hearing these two words, Witten and the other scholars in the conference room were stunned for a moment, with expressions of surprise on their faces. This was another new term, something they had never heard of before.
Xu Chuan nodded and then explained: "Dark stars, as the name suggests, are stars composed of dark matter or a large amount of dark matter + ordinary matter."
Before he finished speaking, someone in the conference room blurted out a retort.
"Impossible!"
"This is impossible!"
"How can dark matter form stars? Theoretically speaking, it does not have the conditions to form stars at all! This is ridiculous!"
A middle-aged man's voice with strong refutation sounded in the conference room. Xu Chuan followed the voice and looked over. The scholar who refuted him was Professor Jeffrey Robinson from Imperial College of Science and Technology, a top astronomy/particle expert. physicist.
Noticing Xu Chuan's gaze, Professor Jeffrey Robinson took a deep breath, controlled his emotions a little, and then spoke.
"I believe everyone here is well aware of the necessary conditions for the formation of stars. Only when the necessary condition for the collapse of a nebula is that its own gravity is greater than the gas pressure. Only when this physical condition is met, the nebula can form stars and nuclear fusion can occur. ”
"There is no strong interaction between dark matter particles, neither electromagnetic interaction nor strong interaction. Only when the distance is super close can the weak interaction force be felt.
"I believe you all know what this means."
Looking over the other scholars in the conference room, Jeffrey Robinson finally met Xu Chuan's eyes and continued:
"Theoretically, dark matter will not collapse easily under its own gravity. This is why the dark matter clump is very fluffy like a piece of marshmallow.
"It will not collapse into stars, planets, black holes and other materials like nebula gas. This has been confirmed by continuous observations of the universe over decades."
"Dark matter in the universe usually wraps galaxies around them, forming a huge dark matter halo, just like the Oort Cloud wrapping the solar system."
"If it is said that even dark matter can collapse into stars, then our current observations and recommendations on the dark matter of the universe, including the void field theory and dark matter theory established by you, will be wrong!"
In the conference room, many scholars nodded in agreement.
According to the current understanding of the universe in the physics and astronomy circles, most astronomers and physicists believe that stars or planets are created by the gravitational collapse of thin gas clouds and dust.
In the open universe, when the density of a piece of primitive interstellar gas exceeds a certain critical value, the mutual gravity between the gases will gradually exceed the pressure of the gas. In this way, the interstellar gas will begin to shrink and the density will continue to increase. .
As the dense masses of gas grow larger, their own gravity will also increase, further absorbing other gases and air masses.
Finally, as time goes by, these small gas clusters will slowly evolve into stars.
According to the current theory, no matter it is the previous observations and inferences of dark matter in the universe by the scientific community.
It is also the void field and dark matter theory established by Professor Xu. The properties of its dark matter particles indicate that it is impossible to form such a compact and huge celestial body as a star.
After all, without the strong interaction force and the electromagnetic interaction force, theoretically dark matter particles with only extremely weak weak force and gravity are far from meeting the standards for gathering together and fusion to produce heat and light.
For a moment, everyone turned their attention to the man sitting at the top, waiting for his explanation.