As soon as the words fell,

Xu Mang silently turned on his beast mode, and the speed of the former king reappeared in everyone's field of vision, so fast that it was shocking at hand speed, and at this moment, everyone could only see the remnants of Xu Mang's constantly waving arms.

This... What is this doing?

Crazy?

In a flash... The hall was like boiling water, boiling directly, and everyone present exclaimed, their eyes were full of horror, their expressions were a little incredulous, and even a little overwhelmed and confused.

It's so fast!

That's the speed of miracles?

Before he could fully react, everyone saw that Xu Mang was about to finish writing the last blackboard, and finally he wrote a value in a corner at the bottom - 0.833, the unit is femtometers.

“？？？”

“？？？”

“？？？”

This figure surprised many people, especially the researchers at the Jefferson Laboratory of the Ministry of Energy, who were full of astonishment at the radius value calculated by Xu Mang, because it was completely different from the value they measured with the accelerator.

"It's over!"

"With me... The final value of the proton radius is 0.833 femtometers. Xu Mang put down the pen in his hand, looked back at Henry Mirren, and said indifferently: "Professor Henry... I don't know if the results of my calculations are consistent with the results you measured. ”

Then

The researchers who studied the proton radius did not speak, they looked at the number on the blackboard, and for a moment felt unprecedented fear, why is it 0.833? Could it be that Professor Xu Mang miscalculated?

obvious

The values measured by the Jefferson Laboratory of the Ministry of Energy using the accelerator are completely different from the values obtained by Xu Mang using pure mathematics, which many people present can see, but why don't they say it out loud?

finally

The middle-aged man spoke, "Professor Xu Mang... Are you mistaken? This is not the same value that we measured, we used the CEBAF accelerator to measure the proton radius, and we got a value of 0.84184 femtometers. ”

"Mistaken?"

"It shouldn't be possible. Xu Mang shook his head and said with a serious face: "I also want to make a mistake, but it's difficult... Anyway, my result is 0.833 femtometers, no matter how many of you have nothing to do with me, of course... Historically, the mystery of the proton radius will only get smaller and smaller, and eventually reach my value. ”

Although 0.84184 and 0.833 look similar, they are actually a lot different, and the researchers at the Jefferson Laboratory of the National Department of Energy are a little overwhelmed, and they have lost their smiles on their faces.

This...

How exactly did you come up with the numbers?

Are we wrong?

An absurd idea appeared in the minds of every researcher in the Jefferson Laboratory, and indeed, as Xu said, the proton radius was shrinking, from 0.8768 to 0.84184 at the beginning, and then to the latest 0.833.

The footsteps of history tell others that 0.833 will be the proton radius value for a period of time, but it is definitely not the final number.

Damn it!

How exactly is this done?!

"No, no, no!"

"I absolutely don't believe it's real. An extremist researcher shouted at Xu Mang: "It must be your calculation error, we used the latest 'PR' experiment to get the proton radius, you... You rely on a limited amount of data, and then you do it mathematically... How is that possible?!"

Time

The audience was in an uproar, and gradually many people began to question Xu Mang's correctness, and they needed an explanation, a convincing explanation.

pity

Xu Mang did not give an explanation.

"Cut!"

"Then you study hard and try to get closer to the value of 0.833. Xu Mang twisted his neck and said calmly: "It's almost over... Dinner has also been eaten, and the problem has been solved, so it's time to say goodbye. ”

"Bye-bye!"

Words fall,

Xu Mang left the place directly, and then the Chinese delegation also chose to leave.

"Impossible!"

"This is absolutely impossible!" The extremist researcher present, standing in front of Xu Mang's blackboard, stared intently at the paragraphs of calculations on it, his pupils narrowed slightly, and his mouth kept repeating his previous words.

No way

When pigs fly!

For this researcher, he could not accept the facts in front of him, after all, what was presented on the blackboard subverted his original concept of physics, and incidentally overturned his own research in this field.

Then

Henry Mirren hurriedly found the middle-aged man, the head of Jefferson's laboratory.

"It's... Is the number calculated by Xu Mang correct?" Henry Mirren asked, "Are you wrong, or is he wrong?"

"I don't know..."

"Although I don't really want to admit it... But I feel—" The middle-aged man stared at the blackboard with a somewhat complicated expression, and said, "Professor Henry... I need to do a new measurement with my team. ”

"Good!"

Words fall,

Henry Mirren also looked at the blackboard, the damn content on it made him doubt the world, and he even felt that he had been abandoned by mathematics, and this paragraph of arithmetic was obscure, let alone calculated... I can't even understand it.

Luck in misfortune,

There wasn't a single journalist on the scene, otherwise... Today will be the most humiliating day for the American physics community.

.meanwhile

"Professor Xu?"

"The result of your calculations... Is it correct?" Xiao Han asked curiously, "Seriously... We can't even understand what you're doing, but is it really pure mathematics to find an unsolved mystery in the field of physics?"

"Uh..."

"Pretty much. Xu Mang thought for a while, and said with a smile: "But we don't have to worry about it, the United States will definitely find a way to solve this problem, but the final number must be 0.833 femtometers." ”

"It's... How did this come about?" another woman with glasses asked, "Now we are so confused that we don't know what's going on, but we just look at you in front of the blackboard, write a calculation, and finally come up with a value." ”

Xu Mang shrugged his shoulders and said helplessly: "Then get the math right." ”

“...”

“...”

“...”

Oh, my God!

Who doesn't want to figure it out? But even if they do, it is estimated that it will not reach half the height of Professor Xu Mang.

"Huh?"

"That's not right!"

"Professor Xu... We seem to have suffered a big loss!" A young man frowned and said with a look of displeasure, "If they take your calculations for themselves, this... Isn't that a disadvantage? ”

"I'm not really interested in what the radius of the proton is, how much it loves. Xu Mang shrugged his shoulders and responded indifferently: "Let them be... Tomorrow we will take care of the final things, and the day after tomorrow we will return home, and I will book first class tickets for you all. ”

it!

I was so happy, I went out with Professor Xu, not only to see the world and increase my knowledge, but also to get a free first-class ticket.

O American Flying to China!

Really expensive!

...

In fact, Xu Mang was completely right, and in the evening of the same day, all the researchers in Jefferson's laboratory returned to their places of work, and by the way, some of them were called back to the conference room from their homes at 10 o'clock in the evening to discuss and revise the next experiments together.

Initially

In the PR experiment, the experimenter emits a beam of electrons at a hydrogen molecule and measures how the direction of motion of some of the electrons is deflected, and then extrapolates the experimental data to the lower electron energy to determine the proton radius.

But this means that some theoretical assumptions must be made that may distort the final result, and perhaps this is where the problem arises.

The theoretical assumptions are wrong...

ultimately

After much deliberation by the Jefferson Laboratory researchers, it was decided that the new PR experiment would inject hydrogen molecules directly into a vacuum tube through which they would pass through an electron beam, rather than keeping them in a metal container, as many previous experiments had done.

This means that no electrons will hit the metal and interfere with the measurements, and how the electron beam scatters both the protons in the hydrogen atom and the electrons in the hydrogen atom are measured.

Distinguishing between these two types of scattering is all about eliminating a major source of error.

Hydrogen atomic density fluctuates.

"Ahem!"

"After a night of fighting, everyone rested for the morning, and in the afternoon, we carried out new experiments. ”

But

No one wants to go to sleep,

Everyone is waiting to see if the final figure is 0.833 femtometers.

In desperation,

The new experiment was conducted overnight without rest, but based on previous experience, it took about three hours from start to finish, or even more than three hours.

"Anyway..."

"What do you think the end result is?" one of the researchers asked a colleague next to him, "too... You just came in the morning. ”

"What the hell happened yesterday?"

The confused researcher asked anxiously, "It seems... Professor Xu Mang has come up with a new concept, right?"

A new concept?

He is directly overturning the research results of others.

"Ugh..."

"It's hard to put into words, but in short, Professor Xu Mang overturned our test data. "He relied only on the information we provided, and then used pure mathematical calculations to conclude that the proton radius is 0.833 femtometers." ”

"Huh?"

"It's... Are you telling a story?"

"The story... It would be great if it was all a story...", the researcher sighed and said helplessly, "I have a bad premonition... Perhaps the results of the new PR experiment may be... 0.833。 ”

This is not a lie.

Theoretical physicists are best at using numbers, formulas, ideas and logic to prove the truth of all things in the tip of the pen, and Professor Xu Mang, as a world-famous theoretical physicist, has this strength.

......