Volume 1: Student Life Chapter 423 When You Feel Good About Yourself
After watching for a while, Yang Yiyi found that Chen Zhou was still motionless.
I immediately stood up and touched the temperature of the takeaway box.
Fortunately, the food is not cold yet...
Yang Yiyi felt that it was necessary for the two of them to buy a microwave oven.
Moreover, this microwave oven is placed here with Chen Zhou.
Otherwise, Yang Yiyi was really worried that Chen Zhou would have to eat cold meals every day in the future.
For Yang Yiyi, who knows Chen Zhou very well, she thinks this possibility is very high.
When Yang Yiyi was in a daze, Chen Zhou's voice suddenly came from behind her.
As the sound reached her ears, a blush quickly appeared on Yang Yiyi's face.
In fact, Chen Zhou completed the theoretical calculations of the Coulomb gauge model .
I realized I had to eat!
Then, when he stood up, he found Yang Yiyi holding something and standing there in a daze.
Chen Zhou then quietly came over.
When Chen Zhou saw the take-out box in Yang Yiyi's hand, his heart suddenly felt warm.
As he spoke, he hugged Yang Yiyi from behind.
Without rushing to break free from Chen Zhou's embrace, Yang Yiyi whispered, "Eat quickly, it will get cold soon."
Chen Zhou put his head on Yang Yiyi's shoulder and said softly, "Eat later. I want to hug you."
Yang Yiyi stopped talking and let Chen Zhou hold her like this.
Chen Zhou didn't hold her for long, maybe just two minutes.
Then he kissed Yang Yiyi on the face and took the takeaway box from her.
Yang Yiyi also quickly escaped and sat back at her desk.
"Yiyi, how long have you been here?" Chen Zhou asked as he opened the takeaway box.
"Hmm..." Yang Yiyi hesitated for a while, "There are still ten minutes left until an hour."
Chen Zhou was stunned for a moment, then he smiled and started to eat his lunch.
After Chen Zhou finished his meal, he did not start working immediately.
Instead, he chatted with Yang Yiyi for a while, and took a walk here and there to help digest the food.
Wait until the room becomes quiet again.
When only the sound of the pen tip rubbing against the paper remained, Chen Zhou and Yang Yiyi were immersed in their own world.
String theory is another approach that can be used to describe the strong interactions.
A milestone in the development of this method was the equivalence of conformal fields and string theory in Anti-De Sitter spacetime proposed by Juan Maldacena.
That is, Ads/CFT corresponds.
As a special case, the glueball operator in conformal gauge theory is defined on the Ads boundary condition.
It corresponds .
This is also another theoretical method for calculating the mass of a colloid ball.
It took Chen Zhou less than two hours to use the Ads/QCD method to obtain the mass of the colloid under the quantum number states of different particles.
Take out the draft paper that summarizes the mass of the rubber balls separately and stack it with the previously summarized paper.
According to the plan, Chen Zhou began to study the next theoretical method.
Time is always moving forward, and Chen Zhou is always keeping up with the pace of time.
"The QCD summation rule is one of the few theories developed in particle physics that can perform such calculations based on the first principles of quantum chromodynamics ..."
Chen Zhou looked at the contents on the draft paper and felt a little emotional.
Although the search for rubber balls has lasted for decades.
The development of theory is also far ahead of experimental observation.
However, the theory behind this is still quite limited.
The QCD summation rule was first proposed by three Russian theoretical physicists: Shifman, Vainshtein and Zakharov.
Therefore, this method is also called the SVZ summation rule.
It links the hadron characteristic parameters such as hadron mass, decay constant, and neutron magnetic moment with several QCD vacuum parameters, namely the condensation of gluons and quarks.
The SVZ summation rule builds a bridge between QCD theory and hadron spectrum.
This is a very successful bridge.
It can be used to approximately calculate many properties of ground state hadrons.
When thinking of these three physicists, Chen Zhou thought of the paper discussing K meson decay.
That was a paper published by the three people in JETP Letters, a professional physics journal in the former Soviet Union.
For the first time, the single-loop decay process of strange quarks was calculated.
Moreover, Professor Shifman once simplified the corresponding Feynman diagram.
As for the simplified diagram, it is the famous "penguin diagram" in particle physics.
Chen Zhou drew this famous "Penguin Picture" on the empty space on the draft paper.
You know what, no wonder it’s called the Penguin Picture, it really looks exactly like a penguin…
Chen Zhou smiled slightly, retracted his scattered thoughts, and returned to the QCD summation rule in front of him.
The "QCD" in the QCD summation rule refers to the QCD theoretical calculation based on OPE.
The "sum rule" refers to the summation of hadrons with the same quantum numbers and quark composition.
The two establish an equation called the master equation through the mathematical tool of dispersion integral.
The master equation is a direct consequence of the duality of the correlation function Π(q^2).
When his thoughts returned to mathematics, Chen Zhou obviously showed more confidence.
Although physics is already far ahead at Level 6, it is beyond the reach of other subjects.
But in front of the big brother of Lv7 mathematics, physics still has to be a younger brother.
This is also the source of Chen Zhou’s self-confidence.
No matter what, mathematics is the cornerstone of natural sciences and one of Chen Zhou's cornerstones.
As to why it is one.
Chen Zhou feels that no matter how unreliable linguistics is, it should still be considered another cornerstone.
【Π(q^2)=i∫d^4xe^(iq·x)<0丨T{(JG(x),JG(0)}丨0>】
[Where JG(x) and JG(0) are the interpolated flows of the rubber ball, and q is the four-momentum of the interpolated flow...]
This formula contains the basic idea and calculation method of the QCD summation rule.
To put it simply, the valence quarks in the vacuum of quantum chromodynamics will only slightly disturb the vacuum.
The properties of hadrons depend on how their valence quarks interact with typical vacuum fluctuations.
Vacuum fluctuations can be represented by several types of condensations.
Such as quark pair condensation, two-gluon condensation, mixed condensation and so on.
However, in actual calculations, it is sufficient to consider only some low-dimensional condensations in the operator product expansion.
After Chen Zhou wrote out the QCD summation rule, the starting point is the formula of the two-point correlation function.
I re-derived it based on the basic ideas and calculation methods therein.
Looking at his perfect deduction process, Chen Zhou couldn't help but reveal a hint of pride.
"Sure enough, an excellent physicist must be an excellent mathematician. And an excellent mathematician can become an excellent physicist in a minute..."
Of course, these words only flashed through his mind for a moment.
He was just thinking about it.
Don't take it seriously...
After all, Chen Zhou is not a proud and arrogant person.
All his self-satisfaction only lasts for a moment.
Then, he would immediately strangle it.
After all, the levels of so many subjects in the system are clearly told to him.
He is still far away!
