The office was in silence, and Qiao Anhua frowned and pondered.

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

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

Pang Xuelin said: "Inert neutrinos, this is not a new concept, right?!"

In fact, as early as the end of the 20th century, scientists proposed similar conjectures, but most scientists at that time regarded lazy neutrinos as the fourth neutrinos independent of electrical neutrinos, Miao neutrinos and Tao neutrinos, while Pang Xuelin proposed them as the medium neutrinos when the three neutrinos were transformed into each other, which was the first time.

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

In the real world and the world of "Earth Cannon", research on lazy 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 in the physics community, inert neutrinos were still candidates for warm dark matter. Physicists believed that they did not participate in any interactions other than gravity. At that time, the icecube neutrino observation station tried to find such neutrinos, but never found in the expected range... So many years have passed, and the theory of inert neutrino related to the inert neutrinos has always been a mystery. In recent years, with the improvement of the observation accuracy of neutrinos, neutrino communication has also been widely used, and physicists have never been able to observe the existence of the fourth neutrino. Now in the physics community, basically no one has studied this thing anymore!"

Pang Xuelin nodded and said, "It is true that 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 and said, "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 lazy neutrinos calculated through mathematical means based on the relevant papers on the World of "Whale Song".

It is precisely because of this impeccable theoretical model in mathematical logic that Qiao Anhua listened to Pang Xuelin for such a long time.

If it were someone else, he would have left long ago.

Pang Xuelin paused and continued: "As for the second evidence, Professor Qiao, you should have heard of the neutrino experimental team of the Daya Bay Nuclear Reactor, right?"

Qiao Anhua couldn't help but be stunned and said, "Of course, the Daya Bay neutrino experiment is one of the most successful basic physics achievements in my country in the early 2000s. This experiment successfully found the third neutrino oscillation mode, which left an indelible contribution in the history of physics. The current Neutrino Research Center of the Chinese Academy of Sciences was established on this team, and even the address is at the original site of the Daya Bay Nuclear Power Plant!"

Pang Xuelin immediately laughed and said, "Professor Qiao, do you know that the neutrino experimental team of the Daya Bay Nuclear Reactor has another result besides finding the third neutrino oscillation mode?"

"There is another achievement? What achievement?"

"That was a paper published by the Daya Bay Neutrino Experimental Team in February 2016. The paper stated that the number of back-electric neutrinos collected was 6% lower than the theoretical predictions. Although it caused some discussion in the physics community at that time, it did not cause much sensation. Later neutrino research did not mention this paper, but this paper has revealed a fact that some back-electric neutrinos may have been transformed into undetectable inert neutrinos."

Pang Xuelin said, while standing up, coming to the windowsill, looking at the tall buildings under the neon lights in the distance, and continued: "13.8 billion years ago, after the Big Bang, there was a sea of ​​light, and the positive and antimatters were constantly annihilated and converted into high-energy photons. As the universe continued to expand and cooled down, antimatter disappeared, leaving a world of matter. The standard theory of the origin of the universe believed that matter and antimatter were generated in pairs or equal amounts at the beginning of the Big Bang. So how did the original antimatter disappear? Professor Qiao, are you interested in working with me to uncover this secret together?"

Qiao Anhua widened her eyes and her breathing gradually became rapid.

He knew what Pang Xuelin wanted to say.

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

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

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

Where θ is the mixing angle, which represents the amplitude of the oscillation, θ12 is the amplitude of the first generation neutrino and the second generation neutrino, and so on; (Δm21)^2 is the mass squared difference between the second generation neutrino and the first generation neutrino, which represents the frequency of the oscillation; δcp is the phase angle of the cp, which represents the different probability of positive and negative neutrino oscillation.

At present, 5 parameters have been measured θ12, θ23, θ13, (Δm21)^2; (Δm32)^2, and the last CP is left to destroy the phase angle δcp, which always plagues the physics community.

This CP is the conservation of charge parity.

c is the conservation of charge, p is the conservation of parity. Scientists have proved that CP is destroyed, and δ is the destruction phase angle. If it is measured that its value is large, it can be proved that it is destroyed by neutrinos.

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

Although the θ13 measured in Daya Bay experiment gives the maximum sign of CP destruction, some scientists even believe that δCP may be 270°. As long as this is the case, it can be proved that it is neutrinos that cause the asymmetry of positive and antimatter, and matter defeats antimatter.

But so many years have passed, and this has always been just a conjecture. Physicists have designed many solutions but have not measured the size of δcp.

Add to that six percent of the neutrinos lost in the Daya Bay experiment.

The mystery surrounding the neutrino's head has troubled generations of physicists.

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

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

Such an achievement will lead human basic physics to a great step forward, and any scientist involved in this research will be famous in history.
Chapter completed!