Massachusetts, USA.

A plane landed at Boston International Airport.

Frank Wilzeck, who had just flown to Boston from ERN's headquarters in Switzerland, got into the student's car.

After the car hit the road, the old professor sitting in the passenger seat put his laptop on the push and connected it to the wireless network. Just as he was about to take advantage of his free time to work on his mail, he happened to receive mail from across the Pacific Ocean.

Seeing the sender's name, he raised his eyebrows with interest and clicked on the email to read it.

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

"Professor, what's going on over there?"

As he looked at the email, Frank said casually.

"So far, the situation is optimistic, and a confidence level of Sigma can be confirmed as a sign, and ERN staff are checking instruments, clearing tracks, holding press conferences, and giving colleagues time to water papers. When the experiment resumes in early October, this month we will finish the theoretical part, and from next month I will let you live in Geneva permanently, huh? ”

Seeing that the professor suddenly stopped talking, the doctoral student asked, "What's wrong?" ”

"Nothing" read the email to the end, Frank frowned slightly, and suddenly shook his head with a smile, "Quite an interesting point, but I don't agree with it." ”

In the email, the young man from China wrote.

Dear Professor Frank, I have some questions about your complementary theory of supersymmetry. According to the Deligne tensor category theorem, we can know that the category that satisfies certain conditions must be a representation category of the supersymmetric group g, so we can say that supersymmetry is a relatively natural generalization of field theory, but in the supplementary theory you proposed, it is assumed that there is an extra dimension beyond the scope of the symmetric field representation to explain the reason for the excessive mass of the supersymmetric particle, is this contrary to the Delgne's tensor category theorem?

Academic exchanges are not about seniority, there is nothing polite, what is is what is, so for the problems found, Lu Zhou pointed out it without tactfulness.

I believe that Mr. Frank will not be able to ask him for an invitation to study together, regardless of his age, nor will he be concerned about such a trivial matter.

However, the old gentleman's reply is also not tactful

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 Verzek's mailbox, leaning back in his chair and stretching.

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

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

Hold the grass, does this old gentleman get up so early?

Swiss time is six hours behind Beijing time, so it's only five o'clock in the morning, right?

At this moment, he didn't know that Mr. Frank had returned to MIT, and he didn't know that he had just gotten off the plane, otherwise he would be even more surprised by the old man's enthusiasm for work.

The reply in the email was very simple, mainly to answer his questions.

Lu: The attachment has been received. Also, with regard to your question, I admire your knowledge of mathematical physics, but my suggestion is that you would do well to review the formulation of Wigner's theorem in quantum mechanics, and you will understand that there is nothing wrong with my assumptions about the supersymmetric complementary theory.

As a researcher engaged in theoretical physics, Lu Zhou will certainly not be unaware of Wigner's theorem, which is the cornerstone of the mathematical formulation of quantum mechanics.

This theorem describes how the principle of symmetry in physical systems, such as rotation, translation, or pt, changes states in Hilbert space.

According to this theorem, elementary particles can basically be represented by irreducible unitaries of Lie groups, and tensor products can be made for these representations. And this operation can correspond to the physical particle binding state.

Isn't it amazing?

Mathematics and physics, linked by a theorem, are organically combined.

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

Lu Zhou knew very well what Professor Frank meant, and his assumptions of supersymmetric complementary theory were in line with the framework formulated by Wigner's theorem, and there was no major problem, but it just lacked mathematical beauty.

For example, as Lu Zhou said, the rationality of this extra dimension cannot be explained by the Deligne tensor category theorem, although the possibility of its existence cannot be completely denied.

Lu Zhou thought for a moment, put his hands on the keyboard, and typed his thoughts.

But don't you think we can use a more mathematically aesthetically pleasing model to explain the eigenpeaks in the 750 gev energy region? There's absolutely no need to introduce an extra dimension outside of a fully represented, symmetric field to explain the source of his mass, to force it to be a supersymmetric particle, I mean, is it possible that this is a dark matter particle that we don't understand?

Although in order to convince the old man, he proposed that the signal in the 750GEV energy region may come from supersymmetric particles, but 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.

And dark matter particles are the most likely ones that Lu Zhou thinks.

After all, this signal is weak enough, and if it weren't for the accumulation of a large number of collisions, this clue might not really be found. Dark matter is difficult to observe precisely because it barely interacts with other elementary particles, including photons.

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

If the old gentleman happened to be in the mail right now, he probably wouldn't have to wait too long to see the letter.

Sure enough, it didn't take long for an email to pop up.

The possibility you are talking about exists, but I don't think it's very likely. I am sure that ERN's equipment is not advanced enough to stably observe dark matter, and if the signal observed on the Atlas and MS detectors is dark matter, I am sure that the characteristic peaks of the two will not be so consistent. If you have any questions about this, you can consult Mr. Lynn Evans. As for my theory, I can also add to it.

Lu Zhou squinted his eyes and saw the email from beginning to end, and before he could think of how to refute it, he threw two more unread emails into his mailbox.

If there is an extra dimension of compaction, then each field in the high-dimensional space corresponds to an ordinary field with zero membrane in the four-dimensional space, plus an infinite number of fields whose masses are inversely proportional to the length of the compaction. And the source of this field can be used as a Fourier series of the original zero membrane field in the compacting dimension!

Supersymmetric particles should also have this kind of field, and it is precisely by relying on this relationship that the coupling of supersymmetric particles and fermions is not suppressed by the Planck 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 in the energy scale below TEV, so you can be a little more confident in LH.

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

However, it was only this first email that hacked ERN's equipment, and the last email gave him a little more confidence in ERN's collider

What the hell is going on?

After staring at the three emails for a while, Lu Zhou's hand resting on the keyboard didn't move.

The old gentleman is so confident in his theory, and what he says is reasonable.

For a while, he was a little speechless, and he didn't know what to do.

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