Great Country Academician

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 that are not very mainstream.

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 particle is the dark matter particle 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 that 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?

Hearing these two words, Witten and other scholars in the conference room were stunned for a moment, with expressions of surprise on their faces. This is another new term, something they have 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, 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 researcher. 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 they are extremely 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 does not collapse easily under its own gravity, which 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 surrounds galaxies, forming a huge dark matter halo, just like the Oort Cloud that surrounds the solar system."

"If even dark matter can collapse into stars, then our current observations and recommendations on dark matter in the universe, including the void field theory and dark matter theory you personally established, will be wrong!"

In the conference room, many scholars nodded in agreement.

According to the current understanding of the universe by the physics and astronomy communities, most astronomers and physicists believe that stars or planets are produced by the gravitational collapse of thin gas clouds and dust.

In the empty universe, when the density of a piece of original interstellar gas exceeds a certain critical value, the mutual gravity between the gases will gradually exceed the pressure of the gas, so that the interstellar gas will begin to shrink and the density will continue to increase.

When the dense gas clusters become larger, their own gravity will also increase, and then further absorb other gases and gas clusters.

Finally, as time goes by, these small gas clusters will slowly evolve into stars.

According to current theories, whether it is the observation and inference of dark matter in the universe by the scientific community before.

Or the theory of void field and dark matter established by Professor Xu in front of him, the properties of dark matter particles show that it is impossible for it to form a compact and huge celestial body like a star.

After all, without strong interaction and electromagnetic interaction, dark matter particles with only extremely weak weak interaction and gravity in theory are far from meeting the standard of gathering together and then fusing to emit light and heat.

For a moment, everyone turned their eyes to the man sitting in the first seat, waiting for his explanation.