Chapter 191 Speechless

Massachusetts, America.

A plane lands at Boston International Airport.

Frank Wilczek, who had just flown back to Boston from the headquarters of CERN in Switzerland, got into the student's car.

After the car was on the road, the old professor sitting in the passenger seat put his laptop on the pusher and connected to the wireless network. Just when he was about to take advantage of his spare time to deal with work emails, he just received an email from across the Pacific Ocean.

Seeing the sender's name, he raised his eyebrows with interest, and opened the mail to read it.

The doctoral student who was driving in the driver's seat glanced at the email on the screen and asked casually.

"Professor, how is the situation at CERN?"

While looking at the mail, Frank said casually.

"At present, the situation is still optimistic. A confidence level of 3 sigma can be confirmed as a sign. CERN staff are checking instruments, clearing the track, holding a press conference, and at the same time setting aside time for colleagues to discuss papers. Wait until early October The experiment is restarted, this month we will complete the theoretical part, and from next month I will let you live in Geneva... huh?"

Seeing that the professor didn't speak suddenly, the doctoral student asked, "What's wrong?"

"It's nothing..." After reading the email to the end, Frank frowned slightly and shook his head suddenly with a smile, "It's an interesting point of view, but I don't agree with it."

In the email, the young man from Huaguo wrote.

【Dear Professor Frank, I have some doubts about your supplementary theory of supersymmetry. According to the Deligne tensor category theorem, it can be known that a category satisfying certain conditions must be a category represented by a supersymmetric group G, so we can say that supersymmetry is a relatively natural extension of field theory, but in your supplementary In the theory, it is assumed that there is an extra dimension beyond the scope of the symmetry field to explain the reason why the mass of the supersymmetric particle is too large. Does this violate the Deligne tensor category theorem? 】

Academic exchanges are not based on seniority rankings, there is no such thing as politeness, what is is what it is, so when Lu Zhou pointed out the problems he found, he was not tactful.

I believe that Mr. Frank will not care about such trivial matters with the attitude that he can invite him to conduct joint research regardless of age.

However, the old gentleman's reply was also unequivocal...

Far away in Jinling on the other side of the Pacific Ocean, Lu Zhou edited this passage and the processed data into an email, and sent it to Frank Wilczek's mailbox, leaning on the chair and stretching.

Just when he was about to get up to eat, an unread email suddenly appeared in his mailbox.

Lu Zhou clicked on the email, then looked at the time in the lower right corner of the desktop, and was suddenly surprised.

Hold the grass, did this old man get up so early?

Switzerland time is six hours later than Beijing time, so it's only five o'clock in the morning over there right now?

At this moment, he still doesn't know that Mr. Frank has returned to MIT, nor does he know that he just got off the plane, otherwise he will be even more surprised by the old man's enthusiasm for work.

The reply in the email was simple, mainly answering his question.

[LU: The attachment has been received. In addition, regarding your question, I admire your foundation in mathematical physics, but my suggestion is that you'd better review the statement of Wigner's theorem in quantum mechanics, and you will understand my understanding of the supplementary theory of supersymmetry There is nothing wrong with the assumptions made. 】

As a theoretical physics researcher, Lu Zhou certainly knows about Wigner's theorem, which is the cornerstone of the mathematical expression of quantum mechanics.

This theorem describes how symmetry principles in physical systems, such as rotations, translations or CPT operations, change states in Hilbert spaces.

According to this theorem, elementary particles can basically be represented by irreducible unitary Lie groups, and tensor products can be made on these representations. And this operation can just correspond to the bound state of particles in physics.

Isn't it amazing?

Mathematics and physics are organically combined with a theorem as a link.

It is also this property that provides a theoretical cornerstone for the later application of the Deligne tensor category theorem in physics.

Lu Zhou was very clear about what Professor Frank meant. His assumption of the supplementary theory of supersymmetry conformed to the framework formulated by Wigner's theorem. There was no major problem, but it lacked mathematical beauty.

For example, as Lu Zhou said, it is impossible to use the Deligne tensor category theorem to explain the rationality of this extra dimension, although it cannot completely deny the possibility of its existence.

Lu Zhou thought for a while, put his hands on the keyboard, and entered his thoughts.

[But don’t you think that we can use a model that is more in line with mathematical aesthetics to explain the characteristic peaks that exist in the 750GeV energy region? We don't need to introduce an extra dimension outside of a well-expressed symmetry field to explain the source of its mass, and force it to be a supersymmetric particle...I mean, is it possible that this is a kind of particle that we don't understand? Dark matter particles? 】

Although he proposed that the signal in the 750GeV energy region may come from supersymmetric particles in order to convince the old man, in fact he is not so obsessed with supersymmetric particles.

There can be many things behind that characteristic peak, and the universe itself is not constructed by a single set of theories.

The dark matter particles are what Lu Zhou thinks is the most likely.

After all, this signal is weak enough. If it weren't for the accumulation of a large number of collisions, this clue might not necessarily be found. The reason why dark matter is difficult to observe is that it hardly interacts with other elementary particles, including photons.

After pressing the reply button, Lu Zhou was not in a hurry to eat, but leaned on the chair and waited quietly.

If the old man happens to be answering emails right now, he probably won't have to wait too long for the reply.

Sure enough, after a short wait, an email popped up.

[The possibility you mentioned exists, but I think it is unlikely. I can be sure that CERN's equipment is not advanced enough to observe dark matter stably. If the signals observed by ATLAS and CMS detectors are dark matter, I am sure that the characteristic peaks of the two will not appear so consistent. If you have doubts about this, you can consult Mr. Lynn Evans. As for my theory, I can also make supplementary explanations. 】

Lu Zhou squinted his eyes and read the email from beginning to end. Before he could figure out how to refute it, another two unread emails were thrown into his mailbox.

[If there is an extra compacted dimension, then every field in the high-dimensional space corresponds to an ordinary field with zero brane in the four-dimensional space, plus infinitely many fields whose mass is inversely proportional to the compacted length. And the source of this field can just be the Fourier series of the original zero membrane field in the compact dimension! 】

【Supersymmetric particles should also have this kind of field. It is because of this relationship that the coupling between supersymmetric particles and fermions should not be lowered by the Planck energy scale, but should be raised. I think it makes sense in theory. So according to this theory, we should be able to find supersymmetric particles at the energy scale below TeV, so you can have more confidence in the LHC. 】

Hold the grass, this typing speed is a bit fast.

However, this first email only hacked CERN's equipment, and the last email gave him a little more confidence in CERN's collider...

What kind of trouble is this?

After staring at the three emails for a while, Lu Zhou didn't move his hands on the keyboard.

The old man is so confident in his theory, and what he said is well-founded.

For a moment, he was a little speechless, not knowing what to reply.