In the venue, Xu Chuan wore a suit and walked onto the podium from the passage next to him.

In the No. 1 lecture hall, there were about two or three hundred people sitting in the audience. Among them, there are little-known small people, and there are also big bulls in the academic world.

It was a meeting that was not inferior to his previous presentation of the Weyl-Berry conjecture at Princeton University.

After all, it is home to nearly half of the world's top theoretical physicists and high-energy physicists.

At this moment, there are more than three Nobel Prize winners in physics alone, not to mention the Einstein Prize winners, Dirac Medal, Hertz Prize, Wolf Prize in Physics and other famous physics prize winners.

.......

On the podium, Xu Chuan tried the microphone, and after confirming that there was no problem, he cleared his throat and said:

"It is a great honor for you to attend today's presentation, the topic of which is a method for calculating the radius of protons and the presentation of experimental data on the radius of atomic charge."

As he spoke, Xu Chuan inserted the USB flash drive in his hand into the computer, controlled the equipment in front of him, turned on the screen projection, projected the PPT, and then began to speak.

In order to leave a little time to report on the solution of the proton radius mystery, Xu Chuan compressed the original report time.

The 45-minute report, the 30-minute speaking time, and the 15-minute questioning time were compressed by him to 15 minutes to complete a method for calculating the proton radius and the report on the experimental data of the atomic charge radius.

After a brief report on the work he had been doing for nearly a month, Xu Chuan looked at the audience under the podium.

"A method for calculating the proton radius and the report of the experimental data of the atomic charge radius, the basic situation is this, the experimental analysis data has been submitted to the organization, and someone will be arranged to carry out careful accounting, do you have any questions?"

Under the podium, in the middle of the room, an arm was raised.

Xu Chuan looked around, and it was a bad old man who raised his hand.

Seeing this person, Xu Chuan immediately remembered the words of Senior Brother Qi Xishao before.

Rishi Frick won't let him go.

This stubborn partisan in particle physics has always believed that the large proton radius is the truth.

Sure enough, here he is now.

He stood here today and raised his own questions about the small proton radius.

This is a stubborn old man, even if Xu Chuan is confident enough in his work, he can't help but have a headache.

After all, the other party is not a parallel professor, on the contrary, the other party has won the Wolf Prize in Physics, which is one of the highest honors in the physics world after the Nobel Prize in Physics.

However, since the other party has already raised his hand to ask questions, it is impossible to avoid it.

After stretching out his hand to signal the other party to ask a question, Xu Chuan looked at the raunchy old man.

"I observed that in the reporter's argument data, on page 9, there is a correction of the incomplete QED value of the energy level of the hydrogen atom by means of the energy level formula, does this affect the final proton radius value? The reporter is invited to elaborate. ”

Rishi Frick stared at Xu Chuan and said word by word.

"Page nine." Xu Chuan flipped through the argument data and found what Rishi Frick knew.

"This correction comes from the fact that the high-speed moving electrons will cause more or less displacement of the protons, which will affect the measurement of the radius of the protons, so it needs to be corrected......."

Before Xu Chuan finished speaking, he was interrupted by Rishi Frick.

"Of course I know this, but according to the historical proton radius experimental data, the traditional QED data correction range is limited to about 0.0012~0.0021, and your corrected QED number is much higher than this."

Hearing Rishi Flick's words, the other physicists in the room immediately focused their attention on this part of the analytical data.

"Worthy of Rishi Flick, the question is to the point."

"It's a problem, but it's not a serious problem, and it's okay to bring the correction parameters back in and calculate it, but I'm afraid the radius of the proton will have to be adjusted."

"Perhaps, as Rishi's stubborn bad old man thinks, a large proton radius is the truth?"

"I always felt that there was something wrong with this, that the correction was outrageous, and that the young reporter was unlikely to make such a mistake, after all, he had solved a world-class conjecture and was very good at mathematics."

On the podium, Xu Chuan's face did not change much, and even showed a slight smile.

The smile stunned Rishi Frick, who was standing in the middle of the room waiting to be answered, and he couldn't understand why he could laugh when faced with a fatal question.

"Professor Rishi's question is very interesting, my correction of the incomplete QED value of the energy level of the hydrogen atom is indeed beyond the previous value, but I will prove to you why I am doing this."

Xu Chuan smiled, stretched out his hand to control the computer on the podium, turned off the projected PPT report, and reopened a demonstration data.

"Please look here, and in the next time, please allow me to make temporary changes, or add to the content of the report."

In the venue, after hearing Xu Chuan's words to change the content of the report, everyone was in a commotion.

The staff, including the staff, frowned slightly, not knowing what the young reporter was up to.

"For a long time, we have relied on two main methods to measure the charge radius of protons."

"One is the energy spectrum measurement of hydrogen-like atoms, and the other is the proton scattering experiment of electrons."

"In the past, we used these two methods to get a relatively accurate proton radius data. 0.87 femtometers, this is a number that we used to use in the past, and it was recognized until 2010. ”

"But in 2010, physicists at the Max Planck Institute for Quantum Optics used meson hydrogen, replacing an electron rotating around the nucleus with a meson, resulting in a smaller number, 0.841 femtometers."

"This is the origin of the problem of the proton radius mystery, and I won't go into much detail about it, but everyone sitting here knows about it."

"Fundamentally, we really want to understand what all the laws of physics are, and if there's a difference that no one can explain, it's possible that we will never understand the laws of physics."

"But today, I'm going to explain here what caused that difference."

As soon as these words came out, there was an uproar in the venue.

Explain the mystery of the proton radius? Did he find the problem?

How is this possible? If it were to be solved so easily after years of unsuccessful efforts by countless physicists, would this problem remain to this day?

Offstage, Cao Hongyuan of Huake University was stunned for a moment after hearing Xu Chuan's words.

He thought that today's presentation would be over after a method for calculating the radius of protons and the presentation of experimental data on the radius of atomic charges.

Unexpectedly, the appearance of Rishi Frick, a bad old man, directly took the situation to another direction.

Solve the mystery of the proton radius. Can this really be done?

Did you really find the problem, or did you force up the theory in response to Rishi Frick's question?

Thinking about it, he turned his head to look at Chen Zhengping who was sitting beside him.

As the mentor of the young man on stage, he should know something in advance, right?

But what is surprising is that Chen Zhengping's expression is almost exactly the same as his previous one, his face is full of doubt, surprise, and even a hint of worry.

It seems that the unexpected situation is also beyond his expectations.

In the whole venue, those who can maintain stability are the project teams of Edward Witt, Frank Wilzek and Xu Chuan, who know this information in advance.

.......

Xu Chuan ignored the commotion in the audience and continued his report.

“.........”

"The traditional 'electron proton scattering atomic charge radius experiment' uses a metal container as an experimental setup for hydrogen atom clouds due to the limitations of the equipment. After entering the experimental equipment, the high-energy electron beam will scatter and interfere with the metal when it collides with the cloud of hydrogen atoms. ”

"From past experiments, the scattering interference generated by the high-energy electron beam and the metal container is so weak that it hardly affects the calculation of the radius data of the protons. Therefore, this part of the data is ignored for calculation. ”

"After the metal container was canceled, the anomaly appeared......."

"Judging from the experimental data of the proton radius measurement experiment, the scattering interference caused by the high-energy electron beam and the metal container is far more powerful than the previous calculations."

"The reason it's ignored is that a large part of its interference is converted into energy level data, which has not been calculated by physicists in the past."

"As a result, the final calculated proton radius value is a bit larger than the correct radius."

"I verified this with some previous historical observations."

"You can look at these data, and through calculations, it is obvious that the experimental energy level data without using metal containers as hydrogen atom cloud equipment is significantly higher by 1.7~1.8 energy levels."

"From this, we can confirm ....."

"The scattering interference from the high-energy electron beam and the metal container is indeed stronger than previously calculated by physicists, strong enough to have an impact on the radius data of protons."

"And the radius of the proton, the actual value is much smaller than the previous measurements."

"Perhaps, when the experimental equipment in the future is advanced enough, the value of 0.831 can be further reduced."

"That's my extra report."

"Thank you for your patience in listening."

..........

There was silence in the venue.

Everyone was stunned by Xu Chuan's report.

No one spoke, not even Rishi Frick, who asked the question, stood silent.

Because part of the scattering interference generated by the high-energy electron beam and the metal container is converted into energy level data, does the radius of the proton be incorrectly calculated?

If this is the case, many physicists in the physics community have long made serious mistakes in the question of the size of protons.

Despite the reluctance to admit it, the numbers don't lie.

The accurate data that has been calculated all point to this serious problem.

Perhaps, the young man on the podium may really be right.

Rishi Frick stood silent.

Although he was reluctant to admit it, he couldn't find a new loophole to refute, whether it was a theoretical point of view, or a loophole in data analysis and calculation.

On the contrary, his previous doubts about the other party were more like an accelerant, making the other party fly higher.

.........

On the podium, Xu Chuan waited quietly for a while, and no one raised his hand to speak and ask questions.

The acceptor stepped onto the podium and made a brief summary of the report. He thanked the researchers who participated in the project, and also thanked Xu Chuan for bringing new discoveries to the physics community.

He also encourages other physicists and research institutions to verify the mystery of the proton radius, hoping that in the near future, this problem can be completely confirmed and solved, and more accurate proton radius data can be obtained.

When the staff announced that the presentation was over, the physicists in the venue also left the auditorium one after another.

Xu Chuan came down from the podium, and the members of the group immediately swarmed over.

"Well done! Composed! Atholl Murphy, an intern at the Massachusetts Institute of Technology, came up excitedly and punched Xu Chuan, making a dull sound in the chest.

"Xu, you have solved a super problem in the physics world, and I believe that next year's Dirac Medal and Einstein Prize will have your share."

Xu Chuan smiled and said, "It's not me, it's us together, your contribution is equally important, I will add your name to the paper, I hope it can help you." ”

Hearing this, the group members all had a big smile on their faces, and nothing could make people happier than this.

A paper can usually have 3-6 authors, the first author, the corresponding author, the second author, the third author, etc., and different authors occupy completely different weights in the paper.

This time the mystery of the proton radius is solved, and the first work and the corresponding author are undoubtedly Xu Chuan's, but the second and third works are also different and ignored for the group members.

After all, this is a well-known problem in the physics world, and the current cutting-edge problem in the field of particle physics is second only to the discovery of five quark particles last year.

If there are no new and important discoveries this year, then the solution of the proton radius mystery will be the most significant achievement of the year.

Being able to sign such a paper, even if it is a second or third work, will be of great help to their future development.

With such a resume, it will be much easier for them to find a job or apply for scientific research experiments or scientific research equipment in the future.

Nanali Kessler from the University of Göttingen, for example, will undoubtedly have a share of her as a full researcher, perhaps even directly from next year to this year.

Especially for Jonah Krier, the youngest member of the group (leaving Xu Chuan) and a PhD student at the Karlsruhe Institute of Technology.

On the one hand, I came to the internship for my studies, and on the other hand, I came for my graduation thesis.

And now, he's done it.

With the weight of the proton radius riddle, even if he could only mix three works in his thesis, it would be enough for him to graduate from any school.

.........