Xueba starts with change

Chapter 530
All of a sudden, the direction of public opinion was reversed.

The self-media, which was originally bouncing up and down, suddenly went silent.

Many self-media started to praise Chen Zhou on the platform.

More importantly, all the media platforms seemed to unify their caliber in an instant.

Take it as the purpose not to believe in rumors or to spread rumors.

The most interesting thing is that a certain big V blogger who took advantage of the public opinion and scolded Chen Zhou scolded him the most.

Directly issued a statement and began to describe Chen Zhou's academic achievements.

It seems to be a personal autobiography for Chen Zhou.

And those who originally followed the crowd and followed the public opinion to make noises also began to silence.

Instead, I started to talk about Chen Zhou winning the Nobel Prize in Physics.

For a while, the internet was completely calm, and it was full of news that Chen Zhou had won the Nobel Prize in Physics.

Academy of Sciences, Institute of High Energy Physics.

Wang Kai and Zhang Haifeng are currently in Fu Haitian's office.

"Director Fu, what should we do now, this... what are we going to do? Have we provoked someone we shouldn't have?"

Wang Kai was a little anxious, but also a little scared.

Fu Haitian was silent and did not speak.

He is not sure now, what is going on.

It is clear that Chen Zhou's whereabouts have not yet been determined.

But why?
Doesn't this conform to the laws of science at all?

Seeing that Fu Haitian was silent, Zhang Haifeng said urgently: "Director Fu, what should we do now? We have no room to reverse the direction of public opinion now? If this trend does not stop, all our efforts , but it's all in vain..."

Wang Kai also said anxiously: "Director Fu, do you have an idea? You asked us to do this? You must have a way, and you must have a backup, right?"

Fu Haitian raised his head and glanced lightly at Wang Kai and Zhang Haifeng: "What's the hurry? Is the sky falling? The sky is falling, and I'm the one holding it up. The people above you are holding it up. Why are you panicking?"

"What's more, the sky hasn't collapsed yet, and the matter has not reached the point of no return. It's better for you to mess up your own situation first."

Wang Kai and Zhang Haifeng looked at each other, Wang Kai still said anxiously: "Director Fu, what do you think we can do to remedy this?"

Hearing this, Fu Haitian frowned slightly, he suddenly regretted, why did he bring such a pig teammate?

Instead, he started to worry about the people around him now.

In case Wang Kai and Zhang Haifeng were interviewed, he doubted very much whether these two people would be able to withstand the pressure without biting themselves and the people behind them.

But now, he was already a grasshopper on the same rope, and if he wanted to get rid of these two people, he couldn't get rid of them.

After thinking for a while, Fu Haitian said, "Don't be scared by the reports. You should know that Chen Zhou is in Europe and is doing CERN's high-energy physics experiment, so we have a lot of time to fight back."

"Think about it carefully. Chen Zhou's whereabouts are still uncertain. No matter what you say, it can be regarded as a respect for Chen Zhou, and it can also be regarded as a means to attract Chen Zhou."

"In other words, we can completely ignore it. We just need to do what we are prepared for."

Speaking of this, Fu Haitian glanced at Wang Kai and Zhang Haifeng again, and his voice suddenly became a little louder: "Furthermore, it is impossible for us to stop now. Once Chen Zhou comes back, then regarding this public opinion incident, even if It’s good to show Chen Zhou.”

"So, we have to calm down even more now, and use Chen Zhou's affairs at CERN as an issue, and do our best to prevent Chen Zhou from returning to China."

After Wang Kai and Zhang Haifeng heard these words, they fell silent for a moment.

They are measuring the whole thing, the responsibility that needs to be taken.

Has it really reached the point where what Fu Haitian said must be done to the end against Chen Zhou?

Fu Haitian didn't bother the two of them. At this time, no one can back down.

Moreover, this truth has to be figured out by themselves.

After a while, Wang Kai raised his head slightly, and said with complicated eyes: "Director Fu, I will send out the information on my side tomorrow!"

Fu Haitian nodded, and said softly: "Although it is very simple for the authorities to investigate, if it is not necessary, when disclosing information, you should still hide your identity."

Wang Kai replied: "I understand!"

Fu Haitian looked at Zhang Haifeng again, Zhang Haifeng slightly dodged his gaze.

When he found that Fu Haitian had been staring at him, Zhang Haifeng gritted his teeth and said, "Director Fu, don't worry, I will do my best to do my job well."

Fu Haitian squinted his eyes imperceptibly, but didn't say much, he only told Zhang Haifeng to do the same, not to reveal his identity unless it was absolutely necessary.

After Wang Kai and Zhang Haifeng left, Fu Haitian took out his mobile phone and made a call.

Only after the phone call was over, Fu Haitian felt a little more at ease.

The direction of public opinion gradually began to favor Chen Zhoushi.

Suddenly, these self-media people started bouncing around again.

In particular, some big Vs who are not doing business, started to work hard towards Chen Zhou's joining CERN by taking advantage of Chen Zhou's high-energy physics experiment at CERN.

All of a sudden, public opinion kept changing.

People who don't know the truth can't tell the truth from the fake.

I just feel that since Chen Zhou has already started high-energy physics experiments at CERN and joined the CERN research group, he must have chosen CERN.

Therefore, they followed the self-media who delivered materials from Fu Haitian and others, and began to turn their guns and re-target Chen Zhou.

How should I put it, this incident has continued to this day, and in Chen Zhou's own eyes, he has always looked like an outsider.

After all, he never said a word from the beginning to the end,

These public opinions that attempt to discredit him are completely like a clown.

In fact, for Chen Zhou, the real choice is in his own hands.

No matter what the outside world said to him, he just had to choose to go back.

Then, all public opinion will disappear.

Chen Zhou thought so, Yenching University also believed that Chen Zhou would come back.

However, Li Zhenbang, who was sorting out materials in the science and technology department at the moment, had a complicated expression on his face.

Originally, he thought that with the hand of the old leader, issuing an announcement would be enough to quell this farce from beginning to end.

But he didn't expect that the tenacity of the people behind the public opinion was beyond his imagination.

Frowning slightly, Li Zhenbang grinned at the corner of his mouth, and said with a soft smile: "It's getting more and more interesting, I'll see how capable you are..."

Li Zhenbang, who was backed by the old leader, immediately began to deploy corresponding public opinion guidance.

If this really allowed this group of people to succeed, it would be completely over.

Chen Zhou, who was far away at CERN, also began to officially enter the state at this moment.

Neutrinos are strange particles, they have neither electric charge nor magnetic moment, and are relatively stable particles.

Although the interaction between neutrinos and matter is very weak, the number of neutrinos is not small at all.

As far as current understanding is concerned, there are three types of neutrinos known.

They are the electron neutrino Ve connected with the electron, the muon neutrino Vμ connected with the muon, the tau neutrino Vτ connected with the tau, and their respective antiparticles.

It's just that people don't know how many kinds of neutrinos there are besides this.

One property of neutrinos is their rest mass.

Theoretically, the rest mass of neutrinos may not be equal to 0, but has a certain value.

But experimentally, only the upper limit of neutrino mass is known, but no one can accurately measure the value of neutrino mass.

For example, electron neutrinos, only one experimental group gave results with a mass other than zero.

For other experimental groups, only the upper limit of their mass is given.

Therefore, due to the inconsistency of the results, there is still no conclusion about the neutrino mass.

In recent years, there have been many speculations and discussions about the existence of heavy neutrinos.

Many physicists believe that neutrinos that arise in weak interactions, including electron neutrinos that participate in the beta decay of atomic nuclei and muon neutrinos that accompany muon decay, are actually a class of neutrinos called light neutrinos. V1, and a mixture of another type of V2 called heavy neutrinos.

The value of V1 is that their mass is very small, close to 0.

V2 means that they have a higher mass.

And this illusion of light neutrinos and heavy neutrinos mixing is becoming the subject of active research by physicists.

If such mixing does exist, how can it be directly confirmed experimentally?
The answer lies in the measurement and analysis of atomic beta decay and the energy spectrum of beta rays.

In addition, the mixing of light neutrinos and heavy neutrinos can cause neutrino oscillations.

That is to say, the properties of weakly interacting neutrinos will change in an oscillatory manner during the propagation process.

According to previous experiments, the β-rays produced by the β-decay of atomic nuclei have a continuous energy spectrum.

After transforming the intensity of the β-ray in the energy spectrum with a function, and plotting the energy of the β-ray in a Gouli, a straight line will be obtained.

However, if in beta decay there is a mixture of light and heavy neutrinos, and the nuclei undergoing beta decay are energetic enough to produce heavy neutrinos.

Then, the β energy spectrum will include two parts: the energy spectrum of the emitted light neutrino component and the energy spectrum of the heavy neutrino component.

According to the mixing percentage of light neutrinos and heavy neutrinos, that is, the mixing intensity, the two parts of the energy spectrum each occupy a certain proportion.

It will cause, because the total β energy spectrum is the superposition of two parts, which is plotted in Gouli, so it is no longer a straight line.

That is to say, if there is a mixture of light neutrinos and heavy neutrinos, there will be a turning point in the Gouli plot of the β energy spectrum at the energy corresponding to the occurrence of heavy neutrinos.

Therefore, the existence of heavy neutrinos can be found by measuring and analyzing the shape of the β energy spectrum.

In addition, the mass of heavy neutrinos can be determined by the energy region where this turning point appears, and the mixing degree of heavy neutrinos can be determined by the size of this turning point.

As early as 1985, Canadian experimental physicist Simpson used the method of measuring and analyzing the beta energy spectrum of tritium nuclei to look for heavy neutrinos.

Through this experiment, Simpson announced that in the beta decay of tritium, heavy neutrinos with a mass of 17.1 keV/c were found, and their mixing intensity was 3%.

Simpson then gave a lecture on the experiment at Harvard University.

It also aroused great interest among the physicists present.

It's just that Simpson's experiment has many details that cannot be explained clearly.

For example, Simpson is looking for heavy neutrinos by measuring the low-energy beta spectrum.

But we all know that when measuring the low-energy β-energy spectrum, the serious problem is the distortion of the low-energy β-energy spectrum in the experiment.

This distortion is easily caused by the scattering and energy loss of low-energy beta rays.

And this kind of distortion will cause the illusion of heavy neutrinos mixing!
Tritium's β-ray energy is particularly low, so this problem is particularly serious!

Therefore, in the face of many doubts, Simpson's experiment must be rechecked.

The verification result is naturally a little regrettable.

Since then, many physicists are also working on finding the existence of heavy neutrinos.

Unfortunately, so far, physicists have not been able to accurately measure their mass.

At the same time, since the neutrino is a neutral particle, it is currently impossible to determine whether the antiparticle of the neutrino is itself.

If yes, neutrinos are called Majorana particles, otherwise they are called Dirac particles.

The GERDA experiment in Italy is currently using neutrino double-beta decay for judgment.

But no Majorana particle signal has been seen yet.

Chen Zhou's experiment this time is to simultaneously judge particle signals, search for heavy neutrinos, and accurately measure their masses.

in the hotel room.

Chen Zhou, who came back from the laboratory, was looking through the literature at the moment.

"The mass eigenstate and taste eigenstate of neutrinos are inconsistent, resulting in neutrino mixing, which is represented by the unitary matrix PMNS matrix..."

"Neutrino mixing means that neutrinos of different flavors will transform into each other during the propagation process, which is the phenomenon of 'neutrino oscillation'..."

"Theoretical calculations show that neutrino oscillations are jointly determined by the PMNS matrix and neutrino mass difference..."

Chen Zhou habitually took a pen and pointed at the draft paper on the desk.

As far as the parameters of the current PMNS matrix are concerned, there are a lot of issues involved.

有3个混合角θ12、θ13和θ23，有1个CP破坏相角δ，2个Majorana相角α1、α2。

Among them, the Majorana phase angle has physical meaning only when the neutrino is a Majorana particle.

Chen Zhou picked up a pen and circled the PMNS matrix and these parameters.

Write next to it with a pen: "Use a mathematical method to solve it theoretically."

Afterwards, he continued to browse through the literature.

Judging from the current research progress, the Daya Bay neutrino experiment in 2016 increased the accuracy of θ13 to 4%, which is still the most accurate value in the world.

Seeing this, the corners of Chen Zhou's mouth could not help but curl up.

He felt that if CERN is used as a place to practice.

After returning to China, it is not impossible to flex its muscles in the Daya Bay neutrino experiment.

However, even if it was a training place, Chen Zhou didn't intend to fool around.

Among other things, he is already ready for the state of explosive liver research.

However, just as Chen Zhou devoted himself to research.

His cell phone rang suddenly.

After seeing the caller ID, Chen Zhou slightly raised his eyebrows.

It seems that one of the previous preparations seems to have come to fruition.

　Thanks to book friends 20180714065600265 for the 100 starting coins!
　　Thanks to book friend Yan Hongxue for the 100 starting coins!
　　
　
(End of this chapter)