Research starts with PhD students

Chapter 82 Head-on confrontation, a battle of life and death!
In late June and early July, the Physics Center of the Institute of High Energy Physics was very busy.

Many staff members maintained a 996 status, with the aim of completing the "deviation" calculation of small experiments and obtaining results before the ICHEP meeting.

After learning about the "deviation value", people in the computing center, including Cao Mengbo, Cui Kaiwen, and deputy director Bao Hexing, became very interested.

The high-energy physics conference has little to do with the computing center, but any new results, especially those involving particle research, can also be released at the conference.

At the CHEP meeting, the Computing Center had a sense of being the center of attention.

Other high-energy physics institutions were all paying attention to their analysis results of the experiments. They became the core focus of the meeting, and many of their originally arrogant colleagues took the initiative to come and discuss issues related to analysis algorithms and results.

Now that we are holding a high-energy physics conference and can come up with an analysis result, doesn’t it once again prove the strength and level of the computing center?
Deviation degree is a comprehensive index of deviation analysis.

This index does not require repetitive calculations, but only requires a code to record and enter the numbers during the evaluation deviation calculation process.

Finally, perform summary calculations.

Based on the deviation analysis algorithm, the deviation calculation is relatively easy. As long as you understand the deviation value, you can modify it based on the algorithm to get the output value of the deviation.

The computing center worked continuously for more than ten days and finally completed the algorithm modification for small-scale experimental deviation analysis.

Then they performed their first analytical calculations.

That was an analysis based on data from an experiment last year, and the final deviation was determined to be '0.0639%'.

The results of the experimental deviation analysis did not show any obvious abnormalities.

Soon, they conducted a second experimental analysis.

The deviation analysis results measured this time showed a "regional particle fault phenomenon", that is, the number of particles in a small area was abnormally scarce.

The Physics Center attributes this phenomenon to 'air particle interference'.

After seeing the results of the image analysis, Cui Kaiwen and Bao Hexing subconsciously felt that the deviation would definitely be very high, but the measured results were unexpected.

"0.0593?"

"Lower than last time?"

"Isn't there a miscalculation?"

"That's impossible. We just added a module for calculating the accumulated deviation. The deviation is an accumulated data. How could there be an error?"

Deviation is an accumulated data.

Each deviation assessment calculation will result in a very small increase in the deviation.

In this way, the data is accumulated slowly and even if some calculated values ​​are too large or too small in the middle, it will not have much impact on the final result.

Cui Kaiwen asked someone to check whether there were any anomalies in the data during the calculation. It was found that in the area with 'sparse number of particles', the output deviation calculation data was dozens or hundreds of times larger than that in other areas.

However, the 'deviation' of the overall calculated output is still lower than the analysis result of the previous experiment.

They then performed a third analysis.

There were no abnormal results in the deviation analysis data this time, but the deviation reached '0.0691%'.

After analyzing the results of the three experiments, the Computing Center held a discussion meeting.

"Deviation, this data is accumulated slowly through repeated deviation assessment calculations."

“I’m sure there’s nothing wrong with the algorithm.”

"That is, there is no problem with the calculation results. However, the deviation value of the experiment with 'air particle obstruction' is also similar to that of other experiments..."

"This result... is amazing."

Kevin Cui used the word "amazing" in his report.

He was much more surprised in his heart than he appeared.

When he said he wanted to do a deviation analysis for a small-scale experiment, Zhang Shuo estimated a number that the deviation was between 0.05% and 0.07%.

The analysis results are exactly the same as Zhang Shuo's prediction.

Kevin Cui already has a deep understanding of the bias, and he is sure that the bias will not be affected by the algorithm itself.

This can be verified through testing.

For example, input fake data into the algorithm program once and see the result.

“This could be a significant discovery.”

Cui Kaiwen continued, "No need to continue. When we get to Melbourne, we only need to make a report around the 'deviation' value and then present the experimental analysis results."

Many people agree with what Cui Kevin said.

If there is no problem with the calculation of the deviation value, then there may be some unknown situation hidden in it.

After the meeting, Cao Mengbo said to Cui Kaiwen and Bao Hexing, "If there is no problem with the data we calculated, we will need those physicists to analyze and study it later."

Cui Kaiwen and Bao Hexing looked at each other, their expressions somewhat helpless.

That's the problem with computing centers.

No matter how advanced the algorithms they create or how amazing the results they analyze, the research still needs to be done by physicists.

The experiments are not theirs, and the theoretical research is not theirs.

Computational analysis, no one cares at all.

Even when a major discovery is made through computational analysis, the ultimate credit goes to the physicist who explained the discovery.

They discussed it depressingly for a few minutes, then talked about the upcoming high-energy physics conference.

"If the analysis results are released, many people will definitely question the value of 'deviation'."

"Who will give the report then?"

Cao Mengbo and Bao Hexing looked at Cui Kaiwen together.

Cui Kaiwen said, "I can make a report on this value, but the research belongs to Zhang Shuo, right?"

"Moreover, the degree of deviation is not just a numerical value, it is also related to the deviation assessment system. I think it is better for Zhang Shuo to make the report himself..."

Cao Mengbo listened and nodded, and said with some concern, "Zhang Shuo is indeed very suitable to give the report. He has a cooperative project with us, so it makes sense for him to represent the Computing Center... But can he do it now?"

"ICHEP is about to start. He must be under a lot of pressure, right?"

"Academician Tan has already set off!"

At the same time, on the third floor of the central cafeteria of Sudong University, Zhang Shuo was eating with several people from the School of Physics.

Among them are Academician Yang Haifeng, Gao Xiaohong, and three other researchers, all of whom are members of the CMS collaboration group of Soochow University.

Yang Haifeng is about to go to Melbourne with Zhang Shuo to attend a meeting.

This is also a meeting before the conference.

Yang Haifeng kept telling Zhang Shuo, "Don't feel pressured when you give a report at a meeting. Be more confident and express what you want to say."

"You need to communicate with Agostini's team in advance. They are very experienced. You should decide in advance which part you will talk about, when you will go on stage, how to deal with problems, etc."

"Many things need to be thought about and prepared in advance."

"You may be targeted for making a report..."

Zhang Shuo will definitely be targeted when he gives a report because he looks young and easy to bully.

Agostini would also be targeted, but his team was experienced, and unless there were mistakes in the research, there was nothing others could do.

Zhang Shuo is different.

Seeing that he is young and has little experience, those people might deliberately ask him tricky questions.

Zhang Shuo listened patiently, nodded and smiled, "Academician Yang, don't worry, I know what to do, nothing will go wrong."

Gao Xiaohong also said, "Academician Yang, although Zhang Shuo is young, his performance in giving a report may be no worse than yours."

"At the last CHEP, he questioned Agostini in public, but he was calm and composed in his report and directly stated his own thoughts."

“I have great confidence in him!”

Others nodded and said, "I watched the video too, it's really amazing."

"At that kind of international conference, I can only read from the script when I get on stage."

"Me too……"

Yang Haifeng smiled and said, "It's good to be confident. The most important thing is to prepare yourself mentally..."

He was still a little worried.

What Zhang Shuo has to do is not an ordinary report. Regardless of whether his research is correct or not, he will definitely be targeted by the CP groups of major high energy institutes.

Those who are engaged in CP violation research are all top physicists.

Think about...

A young man in his early twenties gave a report.

There was a row of top physicists sitting in the audience.

They stared at the stage with their eyes wide open, aiming to find problems in the report, and would deliberately ask tricky questions from various angles.

Just thinking about this scene makes my scalp tingle.

……

Yang Haifeng was right.

The heads of several major CP teams are already sharpening their knives.

Francisco Filifer, head of the CP group of the Nuclear Organization, arrived in Melbourne a week in advance, bringing with him a team of more than a dozen people.

Part physicist, part data algorithm expert.

For Francesco Filifo, the purpose of his coming to Melbourne was to face off against Agostini.

Soon, Gasol Grayward, head of Fermilab's CP group, also arrived, bringing with him a team of nearly ten people.

Greyward was even angrier than Francisco.

If Francisco came for a head-on confrontation, Greyward came for a "battle of life and death".

If you lose, everyone who comes will be fired.

When Grayward saw Francisco, he asked angrily, "You actually gave them data for such research!"

"By the time I knew about it, they had already completed the analysis."

Francesco explained gloomily, "Agostini is from the data center, and his team is originally engaged in the analysis of hyperon decay."

"You'd never guess that, at the beginning, that guy wanted to invite me to join the research... He's really crazy!"

"He must be crazy!"

Greyward said seriously, "This is impossible. Is the experimental signal conversion method ineffective? We use this method to measure the CP violation signals of the three mesons!"

Francisco nodded and said, "There must be something wrong. We need to find the error in the report."

He then asked, "Has Tan Zhiming from the Chinese team arrived?"

"Why are you looking for him?"

"The research was done in China. Don't forget that Agostini has a collaborator, a young man named Zhang Shuo."

Francisco said, "I've thought about it carefully. This young man named Zhang Shuo may be crucial. He has studied a deviation analysis algorithm and is undoubtedly an algorithm genius."

"Agostini went to Sudong University and then completed the research. I think Zhang Shuo will be crucial!"

Two days later, Tan Zhiming also arrived.

Francisco and Greyward went to see Tan Zhiming together, and they met in the square of the conference center.

There is a group of people following behind each person.

The first thing Francisco said when they met was, "This research is wrong. Signal analysis must be effective, right?"

"Yes, I am quite sure of it!"

"Me too."

The three of them reached an agreement and put their hands together to show their unity. "Let's find the error together!"

The background of this scene is a large group of people standing nearby...

(End of this chapter)