Chapter 271

Inside the conference room, everyone's eyes turned to Xu Qingzhou in front of the whiteboard. Their expressions were fascinating—surprise, astonishment, and disbelief.

Xu Qingzhou was very calm. He wrote two more rows of formulas and said slowly, "In the big model, can we let the model simultaneously include the contributions of signal and background, allow for interference terms between them, and simultaneously calculate the correction factor of the interference effect on signal strength?"

Academician Yang pondered for a moment and nodded, "Feasible. Little Xu, continue."

He really has ideas? Wang Qiming's mouth twitched. This development was a bit strange. He knew Xu Qingzhou was a number theory genius and also had research in the quantum field, but particle physics was completely different from Xu Qingzhou's research direction.

His gaze darkened, and he simply picked up a pen, intending to verify the truth.

Xu Qingzhou turned his head, started writing on the whiteboard, and muttered to himself: "If it's like this, the background model needs a major overhaul. After all, with the existence of interference terms, it must be strengthened to capture different components in the background."

Tap tap tap~ 【. hi^2(heta)=\sum_{i=1}^{n}\left【\frac{d(x_i)-f(x_i; h】

Several rows of formulas appeared on the whiteboard again.

Song Yao didn't speak, playing dead.

Read! {

The lecture hall appeared in sight. Academician Yang turned to look at Zhang Changqing and asked with a smile, "Little Zhang, no problems, right?"

"."

Who knew it would take a sharp turn for the worse today.

Entering the building, Professor Baker said with a smile, "We were having a barbecue party last night. We originally wanted to invite our Xia Nation friends over, but heard you were rushing the plan. What a pity. After the experiment ends, we must have a good drink."

Shen Yuanjie and Zhang Changqing nodded, agreeing, but also feeling a bit emotional. The objective laws of the world are right there; the problem is, not every researcher can notice them.

Mia was also stunned for a moment, putting down the notebook in her hand.

In this addition, the superposition principle and probability amplitude addition rule were used, and interference terms were added.

Shen Yuanjie smiled on the side. Little Zhang's words were crude but made sense. He asked again, "How did you think of this improvement method?"

"Hoo~"

Xu Qingzhou couldn't help but take an extra look at the woman on the podium talking to the staff. She was under 30, had some freckles, and no expression on her face—comparable to the cold and aloof School Beauty Song.

"Let's go, time to work."

Yeah, it's that person from Xia Nation called "Xu Qingzhou."

Song Yao: "Photo\jpg"

Just at this moment, an abrupt sound rang out in the conference room.

This set of plans was already perfect. If nothing unexpected happened, they could win.

In the corner, Chen Peipei secretly glanced at Xu Qingzhou, who had just sat down. Alright, now it looked like this little brother was completely different from her.

After chatting with Song Yao for 10 minutes, seeing that Mia was already debugging the microphone on the stage, Xu Qingzhou put down his phone and opened his notebook.

However, the other party was very serious and didn't notice her gaze at all.

Academician Yang also said, "I'm looking forward to it too."

"That woman is his student, Mia Ryan. She has inherited Abby Baker's true teachings and is a very formidable character."

As he spoke, he looked at the woman on the podium.

The biggest difference was that the American team used renormalization group theory when suppressing background events, while the Xia Nation team used the superposition principle and probability amplitude addition rule of quantum mechanics.

The most surprised ones should still be Academician Yang and the others around Xu Qingzhou; their expressions were all somewhat surprised.

Mia's plan report meeting ended. She scanned the room and asked, "Does anyone have anything to add?"

At the very front, Academician Yang shook his head helplessly, thinking to himself that this little guy was quite vengeful.

In the corner of the desk, Er Miao lay lazily, continuing the sunbathing from back at Yandongyuan.

Very certain, there was no problem with this plan.

Next, use corresponding data-driven methods to evaluate the level of background generation.

Zhang Changqing hugged Xu Qingzhou's shoulder and said admiringly, "Junior brother, awesome!"

Xu Qingzhou clicked his tongue. While clicking save, he thought about having Song Yao bring this outfit back.

10 minutes passed.

When Xu Qingzhou entered the venue, there were already more than 20 people in the lecture hall, besides the LHC expert group, there were other members participating in this experiment.

Zhang Changqing was the spokesperson for the Xia Nation team for this meeting and needed to go on stage to explain the situation of the plan.

Mia's gaze paused, falling on the young man on the side who was burying his head and writing something furiously.

Have pride but don't underestimate the enemy, especially when facing Xia Nation people.

"Professor Yang, we meet again." Abby Baker was enthusiastic.

The meeting ended.

"Renormalization group theory..."

Xu Qingzhou: "We're already an old married couple, what idol baggage do we need? Haven't I seen you in every sloppy state?"

Song Yao: "Not busy, reading books at home."

In the conference room, everyone was whispering, but even the CMS experts in the front were slowly shaking their heads, saying "perfect."

After two days of calculation, the method of identifying photons using multiple variables was added to the plan, and the correction factor for signal strength and photon energy calibration due to the interference effect between signal and background were also provided.

At the entrance of the conference building, Academician Yang stopped with Xu Qingzhou and Zhang Changqing to greet acquaintances. Leading them was a white-haired old man, followed by a blonde, blue-eyed woman.

Renormalization group is a mathematical tool for examining changes in physical systems at different length scales. Physical effects, i. e., subtracting the background, using truncation techniques, taking the integral upper limit as a certain finite value, are used to handle perturbation divergence problems in experimental data and improve the accuracy of measurement results.

Professor Baker nodded and praised, "You Xia Nation people are very careful. I very much agree with that saying you often use: the Pacific Ocean is big enough to accommodate both the United States and Xia Nation. In the upcoming experiments, if we have your assistance, we will definitely have good results."

!.

Professor Baker smiled lightly. He wasn't surprised by this scene. Yes, in front of the Xia Nation people, although he spoke very easily, in reality, the whole group had been busy for several days.

Compared with their plan, it was basically a toss-up.

Just like the initial part, because the background production rate is often much higher than the signal production rate, everyone needs to select events accurately at the beginning.

Shen Yuanjie had a smile on his face. Although he was also from the Academy of Sciences, he also felt Wang Qiming was excessive—a person in his forties or fifties, still making things difficult for a teenager.

Wang Qiming's expression was somewhat unnatural, squeezing out a forced smile: "No, the approach you provided is good."

After the plan came out, he himself had verified it more than a dozen times.

With similar plan completion, the Xia Nation team's chances of winning weren't high. After all, the relationship between the United States and European countries went without saying.

Once Academician Yang's words came out, everyone suddenly felt pressure.

"Xia Nation has an old saying, 'Slow work produces fine products'."

Of course, there were overlapping parts; the two groups had different choices in physical tools and mathematical tools.

"Wait a moment, I have a small question." If this theory is used, it is very likely to cause the Higgs boson mass to change with the energy scale.

Song Yao: "Photo\jpg."

Academician Yang nodded and said in a deep voice, "The Americans are much faster than us. I heard they are already doing the final verification today."

Academician Yang reached out with a smile: "Long time no see."

Xu Qingzhou narrowed his eyes, didn't continue listening, but picked up his pen and buried his head in calculations.

Mia's voice echoed in the lecture hall. Xu Qingzhou also had a rough understanding of the American team's plan. From the framework, the methods used by the other party had many overlaps with theirs.

2 minutes passed.

Most of the improvement plans proposed by Xu Qingzhou involved the model part, which was the content he was responsible for.

"Gentlemen, ladies, good morning."

Seeming to notice someone observing her, Mia looked over.

There were 10 minutes left before the meeting started. Xu Qingzhou took out his phone to chat with Song Yao. Xu Qingzhou: "Busy?"

"That's it for now. There are two days left before the report meeting. I hope that in these two days, we can implement everything we just discussed."

Xu Qingzhou: "Sending a photo after so long, did you go in front of the mirror to tidy up?"

Academician Yang smiled lightly, his mindset was very good, or rather, he was confident. The modified plan was very good, better than all those previous plans.

"That old man is the person in charge of the American team, Abby Baker. How should I put it, very formidable, a top expert in the particle physics community, just a bit mean."

Mia's gaze scanned the room again to see if anyone had questions. This time, she focused on the Xia Nation team's direction. Her gaze was calm but extremely provocative, waiting for competitors to find loopholes.

Besides quantum field theory and particle physics, this theory is now more used in condensed matter physics.

Xu Qingzhou: "No, I want to see yours, that's the only way to make up for the pain of lovesickness."

Everyone's gaze turned to Wang Qiming.

Shen Yuanjie took over the conversation and promised: "Don't worry, we will definitely perfect it as soon as possible."

Song Yao: "Fist\jpg."

Xu Qingzhou said: "Particle physics is different from my research direction, but the objective laws followed are the same."

Zhang Changqing laughed inwardly, admiring this junior brother, actually confronting a professor head-on.

Seems like it was corrected after seven or eight years.

"Let's go, I believe we will definitely hear two wonderful plan reports today." Professor Baker made a gesture of invitation.

Zhang Changqing discovered he had overthought it. Forget it, this junior brother was ridiculously strong; he didn't need him to step forward at all. Amidst the emotion, he had already flipped out draft paper and started calculating according to the train of thought Xu Qingzhou just mentioned.

Xu Qingzhou stopped, took a step back, looked at what he had written, turned his head, and said with a smile, "That's all for my ideas."

With the new plan, everyone started getting busy again.

Actually, Xu Qingzhou's method was very good, at least it could increase the efficiency of excluding background by 50%, but it was a bit stifling. The word "good" was his final stubbornness.

The reason Xu Qingzhou focused on this was simple: as far as the current situation is concerned, renormalization group theory is actually imperfect.

Today could be considered the most relaxed day for Xu Qingzhou in this period. Usually, he would get up at seven or eight to do calculations.

In an instant, everyone's gaze followed the direction of the sound. What entered their eyes was a Xia Nation face that still carried youthfulness.

The American team's plan was very complete. Even if they looked at it with very critical eyes, they couldn't find any major problems at the moment.

After greeting, Mia went straight to the point: "First, I will explain the overall architecture to everyone. We all know that the background issue is the main obstacle to diphoton channel analysis..."

Zhang Changqing and the others showed bitter expressions. Although very unwilling, they also followed suit and shook their heads.

60 minutes.

Wang Qiming's expression wasn't very good. He originally wanted to let Xu Qingzhou learn a lesson, but as a result... Hoo~ he sighed inwardly, comforting himself: as long as the plan can be perfected, it's better than anything.

If he were by her side, he would probably be beaten by Song Yao.

The result was already without suspense.

The two people's gazes met briefly in the air, and then they each did their own things.

For example, the signal model construction method used when establishing the model was completely different. They used Gaussian functions, while the American team used Breit-Wigner functions.

This would lead to differences in Higgs boson properties obtained at different energy scales.

The renormalization group equation is: 【［mm+b(gr－yy(gr)］yr=0】

Academician Yang gazed at the formula on the whiteboard, his expression serious, sketching on the notebook in front of him. Others weren't idle either, all starting to calculate using Xu Qingzhou's method.

Whoa, she was actually wearing her high school uniform at home. Interesting.

Seeing everyone shaking their heads, Mia closed her notebook, preparing to give final thanks and step down.

The reason she was interested was that she had heard this woman's name before. At that time, this person was already a world-class particle physicist.

Academician Yang coughed lightly, nodded slightly, and praised: "The method Little Xu just provided is very feasible. Team Leader Shen..."

Academician Yang shook his head, sighing helplessly, fearing they would miss out on the leading right of the initial experiment.

Xu Qingzhou looked at Wang Qiming, "Professor Wang, regarding what's on here, do you have anything to add?"

Five people walked toward the conference room.

August 17th. 8:00 AM, after eating, Xu Qingzhou followed Academician Yang to the lecture hall. 9:00 AM, the plan meeting officially started.

The meeting hadn't started yet, but there was already a tit-for-tat gunpowder smell.

"Already prepared." Zhang Changqing was very confident.

And regarding the background issue, both chose Monte Carlo simulation, using the simulation tool GEANT4 to generate a large amount of simulation data.

Just when Xu Qingzhou was immersed in calculations, the expressions of Academician Yang and the others next door were somewhat solemn. Their mood was like a roller coaster; they were still happy last night that the plan was very stable.

Mia's eyes were very cold, but for someone like Xu Qingzhou who had been threatened by Song Yao's death stares countless times, there was no pressure.

On this side, Xu Qingzhou smiled and returned to his seat.

Zhang Changqing finished communicating with the staff and came over to chat with Xu Qingzhou.

Xu Qingzhou let out a long breath, looked at the draft paper in front of him, and thought to himself that despite the rush, he finally caught up.

They were originally psychologically prepared. After all, for things like literature, one could rely on subjectivity to turn defeat into victory, but for research, 1 is 1, 2 is 2.

Moreover, although very unwilling, it's normal to have wins and losses. In the March experiment, the Xia Nation team won against the British team.

They had a common doubt in their minds: what problem did Xu Qingzhou have? Xu Qingzhou had already started: "Regarding the renormalization group part, in the third part of the report on page 45, point 9, the formula \frac{dm_h^2}{d\ln\mu}=\alpha\cdotm_h^2+\beta\cdotg^2."

"Have you tried substituting the Higgs boson Yukawa coupling constant by numerically solving the renormalization group equation to obtain the mh^2(λ) curve as it changes with λ?"

(End of chapter)