Xueba starts with change

Chapter 444 The subject of rotation (4000 words chapter)



Chapter 444 The subject of rotation (4000 words chapter)
"Using the QCD summation rule to calculate the energy spectrum of 0-trigluon spheres needs to first construct a reasonable interpolation flow..."

Time passed by Chen Zhou's pen.

The research of mathematics and physics is endless.

The documents downloaded by Chen Zhou also piled up folder after folder.

Fortunately, Chen Zhou is used to reading documents on his laptop.

Unless it is a particularly important document, it needs to be studied with great concentration.

Only when Chen Zhou went out would he print out a copy and bring it back.

Otherwise, if Chen Zhou is like those old people, he likes paper with the smell of ink.

Then the cost of printing materials alone is not a small sum of money.

It has been more than half a month since Yang Yiyi went to LIGO.

Only came back once halfway, but only stayed at MIT for one day, and then returned to LIGO.

According to Yang Yiyi's description, a new round of LIGO experiments is about to start.

And she has been arranged by Professor Rainer Weiss as a LIGO intern to fully participate in the preparation of a new round of experiments.

Like Chen Zhou, Yang Yiyi also received key training from Rainer Weiss.

In LIGO, Yang Yiyi, an intern, also surprised many people.

According to past practice, foreign students from Huaguo may have better theoretical knowledge.

However, the hands-on ability in experiments is still weaker.

But Yang Yiyi, a student, showed a strong experimental quality.

Whether it is the familiarity with the laboratory equipment, the degree of grasp of the overall experiment, or even the suggestion for the experiment.

Yang Yiyi's performance was even more mature than some old researchers.

Therefore, Professor Rainer Weiss changed the original plan in time.

Yang Yiyi stayed in LIGO for a long time to conduct research and study.

For Yang Yiyi's high-quality training, Chen Zhou felt a little lost because she couldn't stay by his side.

In general, I am still happy for Yang Yiyi.

After all, the two of them are the ones who supervise and learn from each other.

Whether it's the past, the present, or the future in the next second.

They all have to be great together.

That's how it came to the end of October.

In the dormitory, Chen Zhou continued to study the subject of the glue ball experiment, as well as the outpost of his grand mathematical blueprint-Ge Guai.

Chen Zhou once again experienced the power of the wrong problem set when studying the strange quantum number glue ball.

In the absence of many documents, Chen Zhou relied on his strong mathematical knowledge and corrected the direction of the wrong problem set.

Forcibly explored a road of research on the strange quantum number glue ball.

When constructing reasonable interpolation streams, Chen Zhou found that there are many streams that satisfy self-selected parity.

However, after adding norm invariance and Lorentz invariance.

There are only a finite number of streams, and there are only 4 non-zero interpolation streams of the lowest dimension.

In view of this situation, combined with the calculation process of the QCD summation rule, Chen Zhou obtained the calculation process of the interpolation flow.

That is j(0→A)——(x)=ig^3, d^adc[g(αβ→t)G﹋(μν→a)(x)][αβG(νρ→b)][G( ρμ→c)(x)].

Although this formula looks simple, it is not complicated to calculate.

However, the objects involved in this formula are not simple.

The a, b, and c here refer to the color index, and μ, ν, ρ, α, and β are Lorentz indexes.

In the SUc group represented by d^adc, the complete symmetry structure constant.

g(αβ→t)=gαβ—αβ/^2 is the projection operator.

Besides, there are the gluon field strength tensor, the dual field strength tensor of the gluon field strength, and so on.

Even Chen Zhou felt a little overwhelmed.

Thanks to him, even though the goals achieved by calculations are small goals, when it comes to real calculations, I still try my best and pay [-]% attention to them.

This did not result in contempt.

After all, the calculation analysis that needs to be considered here is indeed complicated enough.

Because of this, Chen Zhou finally understood why in the past research, the research on strange quantum number glue balls was rarely involved.

Chen Zhou sorted out the research materials from the previous period.

into the next stage of research.

Based on this formula of interpolation flow, Chen Zhou still needs to conduct more in-depth research.

Speaking of which, Chen Zhou also has to thank Professor Artin and Professor Friedman.

Since Professor A Ting approached Chen Zhou last time, the two professors continued to teach Chen Zhou like sheep herding.

Although Professor A Ting also sent Chen Zhou the information of the sub-project, except for the occasional email communication.

Basically, it all depends on Chen Zhou's self-awareness.

And Professor Friedman is even more straightforward.

Chen Zhou didn't take the initiative to find him, and he didn't send him the data processing and other materials after the last experiment.

He will never take the initiative to "disturb" Chen Zhou.

Unless Chen Zhou has not solved the data of the last experiment, and it has been delayed until the next experiment in April next year.

Then Friedman probably couldn't help but ask Chen Zhou what happened.

Because of this, Chen Zhou has an absolutely independent time.

The only one who might be a little disturbing is that senior Knott.

This senior sister came to Chen Zhou's dormitory to look for Chen Zhou more than once during Yang Yiyi's absence.

However, every time she came, she brought her own problems.

It was not easy for Chen Zhou to refuse her.

You can only answer the other party's questions with your fastest and most efficient efficiency.

Then express that you are going to be busy, and ask the other party out in a friendly manner.

If Nott came, Chen Zhou would be immersed in his own world.

Nanott had to be shut down.

And it's a closed door that doesn't know how long it will be closed.

But fortunately, Knott also discovered the pattern later.

She will confirm Chen Zhou's status in advance, and then come to the door for help with problems.

Of course, Chen Zhou also knew the reason why the other party worked tirelessly.

But if it's useless to refuse, then you can only use time to make the other party give up on their own initiative.

"Based on the formula of interpolation flow and the two-point correlation function of the starting point of the QCD summation rule, the operator product expansion of two-gluon, three-gluon and four-gluon condensation can be obtained..."

"|[-]> here means a physical vacuum..."

“以及重整化标度μ,威尔逊系数a0、b0、c0、c1和d0……”

"These Wilson coefficients need to be calculated through QCD theory, then..."

Chen Zhou opened his hands wide open, and the only sound in the room was the sound of the tip of the pen rubbing against the draft paper.

After obtaining the Wilson coefficient through QCD theoretical calculation.

Chen Zhou also entered the next step of formula derivation.

“在关联函数的唯象一侧,强子谱一般采用极点加连续谱的近似形式,这样关联函数的虚部可表示为:1/πImΠphe(s)=f(G→2)M(0→2)——δ(s—M(0→2)——)+ρ(s)θ(s-s0)……”

Whether it is calculation or theoretical derivation, although it is quite difficult.

However, it is Chen Zhou's strong point after all.

Therefore, the theoretical calculation and theoretical derivation proceeded smoothly.

"In this formula, the contribution ρ(s) of the excited state and the continuous state, the threshold parameter s0, and the mass M of the 0-state glue ball—the coupling parameter fG between the glue ball and the vacuum, all have a definition... ..."

“用公式表达的话,就是〈0|j0——(0)|G〉=fGM(0→6)——……”

"Then, by applying the dispersion relation, the formula Π(Q^2)=..."

The thoughts in Chen Zhou's mind were extremely clear, and the pen in his hand was extremely stable when it fell on the draft paper.

It can be said that this part of the content is complicated.

But as long as you figure out the key points, grasp it.

That's a matter of pure mathematics.

However, Chen Zhou was also a little embarrassed.

He felt as if he had touched something different about the glue ball experiment.

And this is due to his Lv6 physics and Lv7 mathematics, the strength of the two leading brothers.

On the draft paper, Chen Zhou has already deduced and completed the correlation function formula obtained by applying the dispersion relation.

Looking at the formula in front of him, Chen Zhou slowed down a bit to continue deriving.

Take a pen and circle the four subtraction items Π(0), Π'(0), Π''(0), Π'''(0) in the formula.

These four are deductions at 0.

Therefore, the relationship between the QCD theoretical calculation and the mass of the glue ball can be established.

Chen Zhou put down his pen and looked at the time.

When Yang Yiyi came back halfway, she had warned Chen Zhou that although research is good, don't forget the time.

After all, what Chen Zhou is engaged in is not an overnight research work, nor is it an explosive research at the moment of inspiration.

It is the combing of a large amount of literature and the grasp of theoretical knowledge.

Therefore, there will be no situation that after the pause, it will not be able to continue.

What Yang Yiyi meant was that Chen Zhou could devote himself to his own research, but don't forget to eat.

When Chen Zhou received the warning, he couldn't help complaining. He felt that he really shouldn't. In order to show that Yang Yiyi was able to take good care of himself, he told Yang Yiyi that he forgot to eat every three days. thing.

When Yang Yiyi heard it, she said, "So, when I'm not around, you have to take care of yourself."

Chen Zhou responded with his mouth at the time, but silently complained again: "Anyway, you're not here, so I don't know if I ate or not..."

When Yang Yiyi heard it, she immediately glared at Chen Zhou: "What did you say? Say it again and I'll listen to you?"

Chen Zhou shrank his head immediately, and said with a smile, "I mean, if you were by my side, wouldn't I need to think about these things? Now I have to think about eating as a whole, so troublesome~"

"Hmph!" Yang Yiyi snorted, "Anyway, you have to take care of yourself, you know?"

"Well, you too." Chen Zhou finally said seriously, "You are alone in LIGO, you have to take care of yourself, you know?"

Yang Yiyi joked: "If I don't bring you food, I only care about myself, how can I take care of it?"

Thinking of this, the corners of Chen Zhou's mouth subconsciously showed another smile.

"I don't know, half a month has passed, how is Yiyi doing over there?"

Shaking his head slightly, he shook the thought out of his head.

Chen Zhou got up to wash up.

It is now past 12 o'clock in the evening.

He has no intention of staying up late to do research on the subject.

The next day, at the usual time, Chen Zhou woke up.

Stretched, turned over and got out of bed.

After a brief wash, he went out for a morning run.

"Hi, classmate Chen Zhou?"

On the campus playground.

Chen Zhou looked at the beautiful girl in front of him inexplicably: "You... also run in the morning?"

Nott smiled nicely: "Isn't it possible?"

"Oh, no..." Chen Zhou said casually, "It's just that I haven't met you all this time, I thought you had a whim..."

Nott's expression froze, and he was about to say something else.

Chen Zhou had already run away first.

Nott hurried to catch up.

However, what Nott didn't expect was that Chen Zhou's physical strength was so good.

Controlling the tempo all the time, running the track.

And she stopped long ago and walked slowly on the runway.

Although I have heard that Chen Zhou has a habit of running in the morning, Nott has always believed that such a person who stays in the dormitory and studies difficult problems must not have much better physical fitness.

It wasn't until seeing him today that Nott realized that he had made a big mistake.

It turns out that an excellent mathematician not only needs mathematical wisdom, but also needs a strong physique.

The only thing that might be wronged by Nott is that she thinks that running is also a way for Chen Zhou to find inspiration.

When passing by Nott who was walking on the runway, Chen Zhou took a look at this person.

This is obviously an example of impulsiveness, getting up early and running in the morning...

It turns out that I guessed right just now...

After thinking about it, Chen Zhou no longer cared about this senior, and steadily completed today's morning jogging plan according to the rhythm he was used to.

It's just that Chen Zhou didn't expect that this senior Knott didn't run a few laps.

But just by walking, I actually walked a lot of laps.

It seems that he ran one more lap than her?
Of course, Chen Zhou also knew what her purpose was.

It's just that these are really just useless efforts.

So, at the end of the morning run, on the way to the cafeteria.

Chen Zhou threw out an olive branch again, and promised to bring Chen Zhou into the top alumni association of the Ivy League school, and said euphemistically: "If you can insist on running in the morning, I will think about it after a year. .”

Regarding the unknown words, Nott said without thinking, "Okay!"

This made Chen Zhou stunned for a moment. Wasn't his original intention to help the other party develop a good living habit?

After pausing for a moment, Chen Zhou had no choice but to say: "That's fine, wait until you persevere in a year."

Nott nodded, and said confidently: "I hope you don't break your promise in a year!"

Chen Zhou waved his hand: "Don't worry, I will think about it after you persist for a year!"

After Chen Zhou finished speaking, the two had arrived at the entrance of the cafeteria.

Chen Zhou lifted his foot and walked into the cafeteria.

Behind him, Nott thought about it and followed him.

Although she is not used to eating Huaguo's breakfast, she doesn't mind changing from this step.

While eating breakfast, Nott thought of one thing, and said anxiously: "Student Chen Zhou, can I still ask you for advice in the future?"

Chen Zhou laughed softly: "If it's just a math problem, you are welcome to come to me."

He still has his own opinion about Nott deliberately looking for time to ask him questions.

Moreover, after talking to Yang Yiyi.

Yang Yiyi just said, she believed in Chen Zhou.

Back in the dormitory, Chen Zhou changed his clothes and sat down at the desk.

Last night was the subject of the glueball experiment.

Well, this morning it is the turn of Ge Guai's research.

(End of this chapter)


Tip: You can use left, right, A and D keyboard keys to browse between chapters.