Starting from the phenomenon of progressive freedom of quarks and 'quark confinement', this is David Gross's advice to Xu Chuan.

If it weren't for the fact that he was the chairman, he would have some knowledge of most of the collision experiments and analysis data, and I am afraid that he would not have been able to give advice.

After all, this is a field that few physicists have stepped into.

It's just that he doesn't know how much the young man in front of him knows about these two fields.

After all, he was too young.

According to common sense, this age is still in the stage of learning and absorbing knowledge, and even if you can make some achievements in some fields, it is only relative.

Because his age is destined to leave a lot of basic knowledge vacant in other fields.

But for now, it seems to be inspiring?

Perhaps the teenager was exposed to both of these in the area of physical study?

Anyway, he had great hopes for the young man in front of him.

From where Witten learned about him, to when he stood on the podium not long ago to solve the mystery of the proton radius, Gross saw the talent and talent of this teenager.

It's a genius, a real genius.

Whether in mathematics or physics, he has what can be said to be a top talent, and he has also stepped out of his own path in mathematics and physics.

Many people think that doing academic or research requires single-mindedness and concentration, but David Gross doesn't think so.

In his opinion, as long as you like it, you can do it.

Do what you love; Dare to ask questions and take risks. Young people need to dare to try. It is possible to fail if you try, but it is impossible to succeed if you don't try.

Moreover, doing what you love is happy even if you fail.

For the teenager in front of him, Gross hopes that he can go a little further.

For someone like him, who has dedicated his life to physics and is already half in the ground, there is nothing more gratifying than seeing a successor in the field of physics.

.......

In the office, Xu Chuan fell into deep thought.

He continued to think as he was instructed by Professor David Gross.

He was well aware of what Professor Gross said about the two areas of 'quark progressive freedom' and 'quark confinement'.

Both of these are knowledge in the field of particle physics.

The former is the result of the old man in front of him winning the Nobel Prize.

It is a counter-intuitive magical physical phenomenon.

In short, at its core, the nuclear force of the nucleus weakens over a short distance, allowing the quarks in the nucleus to behave like free particles. But when the distance between the two quarks in the nucleus increases, the attraction that binds them becomes greater.

This property can be likened to a rubber band, the longer the rubber band is pulled, the more force it will bounce back, but when you don't pull it, it will be loose.

This is the 'asymptotic free phenomenon of quarks', which can be perturbated by the cross-sectional dglap equation of deep nonlinear scattering in particle physics, thus giving rise to the discipline of 'quantum chromodynamics'.

In 2004, three physicists, David Gross, David Politzer and Frank Wilczek, were awarded the Nobel Prize that year.

And 'quark confinement' is also a physical phenomenon.

The description is that quark particles do not exist on their own.

We all know that quarks are the basic units that make up matter.

Quarks combine with each other to form a complex particle called a hadron.

For example, the most stable particles in hadrons are 'protons' and 'neutrons', which are the basic units that make up the nucleus of an atom.

Due to the presence of strong interaction forces, the quarks with the color charge are confined to the other quarks, making the total color charge zero.

Whereas, the force between quarks increases with distance, so that quarks that exist alone cannot be found.

To put it simply, because of the strong interaction force, quarks cannot exist in fragments like 'protons' or 'neutrons'.

It always comes in pairs, or huddles for warmth.

Protons, for example, are composed of two upper quarks and one lower quark through gluon interactions.

Or the five-quark particle discovered by LHC last year, and so on.

However, do these two theories have anything to do with the use of mathematics to narrow down the optimal search decay channel between Higgs and Yukawa coupling of the third-generation heavy quark?

Theoretically, these three can be said to be three completely different things.

Even if Xu Chuan looks at the physics community twenty years later, these three are not too related.

If there is a relationship, it is the "quantum chromodynamics" derived from the "asymptotic free phenomenon of quarks", which has a certain relationship in the study of strong interaction forces.

But this aspect also does not seem to be applied to find the most ideal search decay channel for the coupling of Higgs with Yukawa, a third-generation heavy quark.

However, it is clear that a Nobel Prize-level scholar cannot be unmistakable, and since Professor Gross suggests that the phenomenon of progressive freedom of quarks and 'quark confinement' should be studied in the direction of 'quark confinement', then there must be something hidden in this.

These things can certainly be applied to finding the most ideal search decay channel for the coupling of Higgs with Yukawa of the third generation of heavy quarks.

It's just that he hasn't seen it.

Physics is so big that even if he is a top physicist who has been reborn after twenty years, he cannot know every point of knowledge.

Of course, it is more likely that this is just an idea that has only been born in the minds of Professor David Gross for the past two days.

This is like the evolution of organisms, if there is no external stimulus, it is impossible for organisms to mutate genes and evolve.

Normal physicists don't study this at all.

If it weren't for the email he sent to the professor yesterday, the old man probably wouldn't have thought about this kind of question in his mind.

It's no wonder that ideas born out of accident don't survive in the future.

Xu Chuan didn't bother with this aspect of things, he was thinking about how to study the most ideal search for decay channels from the direction of 'quark's progressive freedom phenomenon' and 'quark confinement'.

The old man across the desk clearly had some ideas in mind, but he didn't say it directly, but gave a hint.

This should be a test for the old man, wanting to see his physical talent, or ability.

Even if he can't think of anything in the end, the other party should tell him the complete idea.

But Xu Chuan can't just give up his independent thinking, and when he already has a clue, if he can't do it, he doesn't deserve to stand at the top of the physics world.

The knowledge in the mind is rapidly stirred, starting with the 'progressive free phenomenon of quarks', to quantum chromodynamics, from 'quark confinement', to vacuum excitation of the lowest energy state......

A series of knowledge points quickly built into a tortuous but connecting thread in Xu Chuan's mind.

Suddenly, he seemed to remember something, and raised his head suddenly, staring at the old man across the desk with sparkling eyes.

"The soft gluon resuming effect of the transverse momentum distribution?"

Hearing this, Professor David Gross looked surprised and asked, "How did you come up with this?" ”

He didn't expect that the young man in front of him would be able to find a breakthrough point in such a short period of time.

After receiving the email yesterday afternoon, he thought about it all night, using the countless collision experiments and analysis data he had been exposed to over the years to find a path that seemed feasible, and it took no less than five or six hours.

Unexpectedly, Xu Chuan only thought about it for less than five minutes before he found this hidden intersection.

Although there was a hint from him, it was incredible.

The soft gluon resuming effect of the lateral momentum distribution is arguably the most cutting-edge and unpopular field in today's physics world.

This field is used to calculate and deal with the color interference effect between the initial and final states of a particle.

But in today's physics world, where colliders are still looking for new particles and checking whether the standard model is correct, how can anyone focus on the chromatic interference effect?

The entire physics community can count those who know something about this piece.

If it weren't for the fact that he was the chairman of the Council, he wouldn't have learned about it.

He was quite surprised that Xu Chuan could find a breakthrough so quickly.

Xu Chuan smiled and replied, "I have learned some calculation methods at the QCD level of the leading order. ”

Hearing this, Professor David Gross suddenly understood.

The calculation of QCD sub-leading order level is based on the results of QCD soft-collinear effective theory.

However, some of the QCD soft-collinear efficient theories involve the knowledge of the soft gluon resuming effect of the transverse momentum distribution.

If that's the case, you can indeed follow this clue to find a breakthrough.

But I have to say that if we can follow the clue of 'quark's progressive freedom phenomenon' to successfully find the breakthrough of the soft gluon resuming effect of the horizontal momentum distribution, the thinking of the teenager in front of me is really enough to jump.

In other words, his intuition and talent in physics and mathematics are truly amazing.

After all, there are many twists and turns in the knowledge points, even if you have learned QCD to calculate at the leading level, it is not so easy to smoothly deduce the past.

It's like playing a game.

Ordinary players only think about the lane and opponent in front of them, and high-end players will think about the next move.

And some people, who have an unparalleled talent in the game, can be counted farther away, and even the lane can be declared the end of the lane after being a moment by the opposite side.

It sounds outrageous, but there are people with such talent.

This is true in the gaming world, and it is also true in academia.

Some geniuses, if you give him a little inspiration, he can give you a lot of results.

Newton, for example, was smashed by an apple and discovered the law of gravitation. And ordinary people who are smashed by an apple will only stuff it into their mouths easily.

.......

Bidding farewell to his ancestor Professor David Gross, Xu Chuan returned directly to his hotel room.

With inspiration and inspiration, the road ahead is much easier.

Huddled in a hotel room, he started from the calculation of the soft gluon resummation effect of the transverse momentum distribution, and began to use mathematics to calculate the data from the Daritz diagram in his hand.

I don't know how long it took, but a mobile phone rang abruptly in the silent room.

was interrupted from the calculation, Xu Chuan touched the phone from the table with some impatience, and said 'hey' after connecting.

"Little junior brother, the acceptance report of this experiment is about to begin, what about you? I don't reply to messages I send you. ”

The call was from Senior Brother Qi Xishaoqi, hearing this, Xu Chuan came back to his senses, looked at the time in the lower right corner of the notebook display, and unknowingly he had been in the hotel room for three whole days.

Xu Chuan asked, "In which conference room, I'll go over now." ”

He had to go over to the report meeting this time.

After all, he is a member of the project team, although he only joined in the middle and late stages, but he is also a member, and it is appropriate to attend the scientific research project report meeting in which he participates.

If there is an objection during the presentation to the part of the analysis for which he is responsible, he is obliged to explain.

Fortunately, this time the most ideal search for the decay channel that uses mathematics to find the coupling of Higgs and Yukawa, the third-generation heavy quark, has a fixed direction, and the rest of the work can be slowly perfected, without worrying about the inspiration flying away.

"Lecture hall No. 2 is about to start, hurry up."

Xu Chuan answered, hung up the call, rushed into the bathroom, washed his face, and tidied up his messy hair.

If time permits, it is appropriate to take a shower and tidy up your appearance before passing.

But it's a pity that time doesn't allow it right now.

......

rushed to the No. 2 lecture hall in a hurry, and the acceptance report meeting had begun.

As a member of the project team, Xu Chuan has his own fixed position, right next to Qi Xishao.

", junior brother, what have you been doing in the past two days, how did you do this? Although the young firepower is strong, you should also pay attention to the number of times and protect your waist. ”

As soon as he sat down, Qi Xishao's voice was transmitted.

He was taken aback by Xu Chuan's state, although his hair had been tidied up, it was shiny, as if he hadn't washed it for several days, his eyes were dark, as if he had stayed up for a few days and nights, and the whole person looked like he had been overdrawn more than a dozen times.

Thinking that he hadn't seen this little junior brother in the office for the past few days, he naturally thought that this little junior brother had gone to play with the Gallic chicken next door.

Xu Chuan rolled his eyes and said, "What do you think, I have been in the hotel for the past two days, and I have some ideas from before, and I have been checking the calculations for the past two days." ”

"Looking for the most ideal search for decay channels coupled with the Yukawa of the third generation of heavy quarks? You haven't given up yet? Qi Xishao asked in surprise.

Xu Chuan nodded, and Qi Xishao sighed: "Pay attention to your body, it's important to engage in scientific research, and your body is even more important, it's not worth it to be tired." ”

Although there is no shortage of diligence and hard work in academics, it is really rare to be diligent and hard-working to the extent of this little junior brother.

Qi Xishao thinks that he is diligent enough, but he also has some other hobbies.

And this little junior brother doesn't seem to have any other interests except for academic research?

Anyway, in the past few months of contact, he didn't see Xu Chuan show other hobbies, and his basic activities are related to scientific research, and he is often seen lying in front of the table for half a day.

It can only be said that he can solve a world-class problem in mathematics and physics at the age of eighteen.

Such people do not succeed, who succeeds?

Xu Chuan smiled shyly and said, "I'll pay attention." ”

"Wait, you just said you found a way? Calculated the best search decay channel? ”

Really sighed, suddenly, Qi Xishao remembered something, and asked in surprise.

He just seemed to hear this little junior brother say that he had an idea and was calculating?

........