According to the custom, the celebrations after winning the home championship will last for a long time, but Luciujian disappeared from Bayern Munich's celebration team after the parade of floats, and if it weren't for the news that he had re-signed on the official website, I am afraid that Bayern fans should be worried again!

After a season of attention, Bayern fans have become accustomed to the frequent disappearance of Lu Qiujian, and they all guessed that the new favorite of their own team may be engaged in scientific research activities, right?

As it turned out, Luciujian boarded the flight back to Geneva after a brief celebration, and before leaving, Magath and Beckenbauer repeatedly told him to remember to report from Istanbul in a few days.

"There's good news for you!" Dr. Evans said as he rushed over to his office back in CERN, still holding a stack of printer paper.

"Oh, there's a new discovery?" Lu Qiujian guessed as he looked at the printing paper in his hand, "Who published a new article or where did you find new evidence?"

"A discovery from your homeland!" Dr. Evans spread out the printer paper on his desk, "The staff of the Purple Mountain Observatory of the Chinese Academy of Sciences have found evidence of the annihilation of dark matter particles in a collaborative study with the advanced thin ionization energy generator of the Antarctic long-period balloon project in the United States!

"I'll take a look!" Lu Qiujian excitedly took the printer paper and found an article written by this Chinese scientist entitled "Cosmic Electrons Discover "Super" in the Energy Range of 3000-8000Tev".

The international physics community has a variety of methods for detecting dark matter, such as underground laboratory detection, collider detection, satellite detection, balloon detection, etc.

Huaguo's planned Jinping underground laboratory uses 2,400 meters of high-purity rock to block most of the cosmic rays, and then uses a 1-meter-thick polyethylene material gate to block and attract neutrons, a 20-centimeter-thick lead layer to shield the outside from gamma rays, a 20-centimeter-thick boron-containing polyethylene to absorb the remaining neutrons, and a 10-centimeter-thick high-purity oxygen-free copper. Used to block gamma rays from lead and other external materials, these shielding devices block out almost every conceivable source of radiation. At the heart of the laboratory, a 1-kilogram high-purity germanium experimental detector is wrapped in cryogenic liquid nitrogen to directly detect dark matter, and the collision between dark matter and germanium crystals generates heat, and they use this principle to detect dark matter.

In addition to the Jinping underground laboratory, Huaguo also has a plan to launch a dark matter satellite. It is said that this satellite trophy is named Wukong, and it seems that it wants to use the fiery eyes of the Monkey King in myths and legends to search for dark matter; this name is not bad, and when a satellite to detect dark energy is to be launched in the future, it can be named after Wuneng!

The high-altitude detection balloon used by the Advanced Thin Ionization Energy Generator (ATIC) of the Antarctic long-period balloon project in the United States is filled with gas the size of a football field and can lift a two-ton detector, and at the same time, there is a unique "whirlwind" in Antarctica. When the balloon rises to 40 kilometers above the ground, it will not be blown far away, and it can be recycled and reused on the spot, so it has become an important area for high-altitude balloon detection.

The main scientific goal of ATIC was to observe high-energy cosmic rays, with the exception of electrons and gamma rays. In 1998, Chinese researchers approached ATIC and proposed to use ATIC equipment to observe high-energy electrons and gamma rays. After many times of communication, the suggestion of the Chinese researchers was accepted by ATIC.

Hey, this is the tragedy of his own unconditional! He is going to Antarctica to ask for ATIC. I had to wait in line at CERN for the LHC test time, and think about the upcoming CEPC. In the final analysis, it is a matter of money; only when the country has money can it build some large-scale basic scientific and technological facilities, and if it has no money, it will have to go to other parts of the world to beg others! In the near future, China also has a plan to build its own high-altitude balloon detector, and perhaps the next discovery will be born in China's own equipment.

The Space Astronomy Laboratory of the Purple Mountain Observatory has been working at the forefront of the international arena and has its own methods for the exploration of dark matter. After reaching a cooperation agreement, the detectors were shipped to CERN for testing, and the results showed that their detection method was indeed feasible.

That's why Dr. Evans got the article early, he had been dealing with the Purple Mountain Space Astronomy Laboratory before, and after the test, they made three observations using ATIC, and in the process of making observations, the observer was improved to improve the energy resolution by a factor of two. The background is reduced by a factor of 5.

In these two successful observations, they collected a large amount of effective data, and through the analysis of these data, they found that the electron energy spectrum was in the energy range of 3000-8000Tev, and compared with the theoretical results, there was a strong "super", and the analysis showed that the "super" It may be a product of the annihilation of dark matter particles, and the observations agree well with the Kaluza-Klein particle model (particle mass 6200Tev) predicted by the theory of dark matter.

Professor Lars Bergstrom, a dark matter expert at Stockholm University in Sweden, has also read this article, and he believes that the observation data of ATIC is very consistent with the data collected by the Pamela Dark Matter Detector in Europe! On the one hand, ATIC measures the sum of electron and positron flux, and on the other hand, it measures the rise in the higher energy range, and sees the flow decrease, so from the ATIC measurement results, the current detection results are more like the annihilation of dark matter particles. Dr. Evans' voice became excited, "This is the first time that human beings have discovered evidence of the annihilation of dark matter particles, and it has a great role in promoting dark matter research!"

"This is both good news and bad news for me!" Lu Qiujian responded with a smile after reading the article, "The good news is that there is one more evidence of the existence of dark matter! The bad news is that the energy range of the dark matter particles discovered this time is too high, completely beyond the design range of the LHC! It does not seem to have a direct effect on my experimental plan!"

The energy level of the LHC is only 14Tev, the cut SSC of the United States is only 40Tev, and the upcoming CEPC project of China is only 50-70Tev. )

PS: This discovery is actually from '08.