The Science Fiction World of Xueba

The office fell into silence, and Qiao Anhua frowned.

Pang Xuelin looked at Qiao Anhua with a smile, waiting patiently for the other party's response.

After a while, Qiao Anhua raised his head again, and looked at Pang Xuelin strangely: "Professor Pang, how did you think of this?"

Pang Xuelin said: "Inert neutrino, this is not a new concept?"

In fact, as early as the end of the 20th century, scientists made similar conjectures, but most scientists at that time regarded inert neutrinos as the fourth type independent of electric neutrinos, Miao neutrinos, and Tao neutrinos. The neutrino exists, but it is the first time that Pang Xuelin proposed it as a medium between three neutrinos.

This is exactly the theory that Pang Xuelin saw from the neutrino paper in the world of Whale Songs. In the world of Whale Songs, experiments have indirectly proved the existence of inert neutrinos, but they have not been directly observed.

In the real world and the "Earth Cannon" world, research on inert neutrinos is even more blank.

Qiao Anhua took a deep breath and said: "Inert neutrinos are indeed not a new concept. I remember decades ago that inert neutrinos were candidates for warm and dark matter. Physicists think that they will not participate in other than gravity. At any time, the IceCube neutrino observatory tried to find this neutrino, but it has not been able to find inert neutrinos in the expected range... After so many years, the theory of inert neutrinos has always been a mystery. In recent years, with the improvement of neutrino observation accuracy, neutrino communication has also been applied on a large scale, and physicists have never been able to observe the existence of the fourth kind of neutrino. Now in the physics world, basically no one Let's study this stuff again!"

Pang Xuelin nodded and said, "It is true. The existence of inert neutrinos has always been controversial in the physics community, but it has not been observed in the laboratory, which does not mean that inert neutrinos do not exist."

Qiao Anhua frowned: "Professor Pang, do you have any evidence?"

Pang Xuelin smiled slightly and said, "The first evidence is the paper I just showed you!"

Pang Xuelin pointed to the manuscript paper on the table.

This is a theoretical model of inert neutrinos calculated by mathematical methods on the basis of related papers in the world of Whale Song.

It is precisely because of this impeccable theoretical model in mathematical logic that Qiao Anhua will listen to Pang Xuelin for so long.

If he changed, he would have left his sleeves long ago.

Pang Xuelin paused and continued: "As for the second evidence, Professor Qiao, you should have heard of the Daya Bay Nuclear Reactor Neutrino Experiment Team?"

Qiao Anhua couldn't help but stunned: "Of course, the Daya Bay neutrino experiment is one of the most successful basic physics achievements in China at the beginning of this century. This experiment successfully found the third neutrino oscillation mode. Indelible achievements have been left in the history of physics. The neutrino research center of the Chinese Academy of Sciences is built on this team, and even the address is at the original site of the Daya Bay Nuclear Power Plant!"

Pang Xuelin suddenly smiled and said, "Professor Qiao, do you know that besides finding the third neutrino oscillation mode, the neutrino experiment team at Daya Bay Nuclear Reactor has another achievement?"

"Another achievement? What achievement?"

"That was a paper published by the Daya Bay neutrino experiment team in February 2016. The paper stated that the number of anti-electron neutrinos collected was 6% lower than the theoretical prediction. Although a certain amount of Discussion, but did not cause much sensation. Later neutrino research did not mention this paper, but this paper has revealed the fact that some anti-electron neutrinos may have been transformed into unable Inert neutrinos detected."

As Pang Xuelin said, he stood up, came to the window sill, looked at the high-rise buildings under the neon in the distance, and continued: "13.8 billion years ago, after the Big Bang was a sea of ​​light, positive and anti-matter continually annihilated and transformed into High-energy photons. As the universe expands and gradually cools, antimatter dies out, leaving a world of matter. The standard theory of the origin of the universe believes that matter and antimatter were produced in pairs or equal amounts at the beginning of the Big Bang. How did the antimatter disappear? Professor Qiao, are you interested in working with me to uncover this secret?"

Qiao Anhua's eyes widened, and his breath gradually became more rapid.

He knew what Pang Xuelin wanted to say.

Because the answer to this question mentioned by Pang Xuelin is likely to exist in the neutrino oscillation!

Under normal circumstances, to fully describe the neutrino oscillation, six parameters are required.

θ12, θ23, θ13, (Δm21)^2, (Δm32)^2, δCP.

Where θ is the mixing angle, indicating the amplitude of oscillation, θ12 is the amplitude of the first-generation neutrino and second-generation neutrino, and so on; (Δm21)^2 is the second-generation neutrino and the first-generation neutrino The sub-mass square difference represents the frequency of oscillation; δCP is the phase angle of CP destruction, which means that the probability of positive and negative neutrino oscillation is different.

At present, five parameters θ12, θ23, θ13, (Δm21)^2; (Δm32)^2 have been measured, and the last CP destruction phase angle δCP remains, which has always puzzled the physics community.

This CP is the conservation of charge parity.

C is conservation of charge, P is parity conservation. Scientists have proved that CP has been destroyed, and δ is the destruction phase angle. If its value is large, it can be proved to be destroyed by neutrinos.

Over the years, scientists have tried every means to try to measure the size of δ, but they have never been able to do anything about it.

Although the θ13 measured by the Daya Bay experiment gives the largest signs of CP damage, some scientists even believe that the δCP may be 270°. As long as this is the case, it can be proved that neutrinos cause the asymmetry of positive and antimatter. The com matter defeated the antimatter.

But after so many years, this is always just a conjecture. Physicists have designed many kinds of schemes, and they have failed to measure the size of δCP.

Add that 6% of the neutrinos lost in the Daya Bay experiment.

The cloud over the head of the neutrino has puzzled generations of physicists.

However, if according to Pang Xuelin's theory, when neutrinos between different flavors need to be transformed into each other through an inert neutrino, then all problems will be solved!

It can even help humans find the dark matter they dream of!

Such an achievement will make the basic physics of mankind take a big step forward. Any scientist involved in this research will make a name for Qing Shi.

This is why Qiao Anhua will become so excited after Pang Xuelin said this.

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