As usual, celebrations after winning a home championship last for a long time, but Lu Qiujian disappeared from Bayern Munich’s celebration team after the float parade. If the official website had not just announced the news of his re-signing, I am afraid Bayern fans

It’s time for us to worry again!

After a season of attention, Bayern fans have adapted to the frequent disappearance of Lu Qiujian. They all guess that the new leader of their team has gone to engage in some scientific research activities, right?

This is exactly what happened. After a short celebration, Lu Qiujian reboarded the flight back to Geneva. Before leaving, Magath and Beckenbauer repeatedly told him to remember to report to Istanbul in the next few days.

.

"I have good news for you!" As soon as he returned to ern's office, Dr. Evans ran over excitedly and said, holding a stack of printing paper in his hand.

"Oh? Is there a new discovery?" Lu Qiujian looked at the printing paper in his hand and guessed, "Who has published a new article or has new evidence been discovered somewhere?"

"Discoveries from your homeland!" Dr. Evans spread the printing paper on his desk. "The staff of the Purple Mountain Observatory of the Chinese Academy of Sciences are working with the American Antarctic Long Period Balloon Project on the advanced thin ionization calorimeter.

Evidence of the annihilation of dark matter particles was found in the research! They plan to publish this result in the latest issue of Nature!"

"Let me take a look!" Lu Qiujian excitedly took the printing paper and found an article written by this Chinese scientist called "Super" discovered in the energy range of 3000-8000tev for cosmic electrons."

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

The Jinping underground laboratory planned to be built by China uses 2,400 meters of high-purity rock to isolate most cosmic rays, and then uses a 1-meter-thick polyethylene door to block and attract neutrons, and a 20-centimeter-thick lead layer.

to shield external gamma rays; 20 cm thick boron-containing polyethylene to absorb remaining neutrons; 10 cm thick high-purity oxygen-free

Copper is used to block gamma rays in lead materials and other external materials. These shielding devices shield almost all imaginable radiation sources. At the core of the laboratory, 1 kilogram of dark matter is wrapped with low-temperature nitrogen to directly detect dark matter.

High-purity germanium experimental detector, the collision of dark matter and germanium crystal will generate heat. They use this principle to detect dark matter.

In addition to the Jinping Underground Laboratory, China also has a plan to develop a dark matter satellite. It is said that this satellite trophy is named Wukong. It seems that it wants to use the blazing eyes of the Monkey King in myth and legend to search for dark matter; this name is not bad.

In the future, dark energy will be detected

Now that we have a large number of satellites, we can continue to name them after Wu Neng! Wu Neng and Wu Neng, doesn’t it mean to understand dark energy? Well, according to this naming method, can the Jinping Underground Laboratory be named Wuxing Mountain? No matter what you are like

None of the dark matter particles can escape when they reach the Five Elements Mountain!

This time, researchers from the Chinese Academy of Sciences used high-altitude balloon detection. The high-altitude detection balloon used by the American Antarctic Long-Period Balloon Project's Advanced Thin Ionization Calorimeter (ati) is filled with gas as big as a football field. It can be

It can lift a two-ton detector. At the same time, due to the unique "cyclone" in the Antarctic region, the balloon will not be blown very far when it rises to 40 kilometers above the ground. It can be recycled and reused on the spot, so this place has become a high-altitude balloon.

Important selection areas for detection.

ATI's original main scientific goal was to observe high-energy cosmic rays, electrons and gamma rays were not among them. In 1998, Chinese researchers contacted ATI and proposed to use ATI's equipment to observe high-energy electrons and gamma rays. After many communications,

The suggestions from Chinese researchers were accepted by ATI.

Hey, this is the tragedy of our own lack of conditions! He is going to Antarctica to seek ATI. He has to queue up at the ern to wait for the test time of LH. Think about the ep that is about to start, and the Chinese high-energy physicists in the future.

Life is much more comfortable than what I am now; after all,

It’s still a question of money. Only when a country has money can it build some large-scale basic scientific and technological facilities. If it doesn’t have money, it can only go to other places around the world to beg others! Recently, China also has plans to build its own high-altitude balloon detectors. Maybe it will be discovered next time.

It will be born in China's own equipment.

The Space Astronomy Laboratory of Purple Mountain Observatory has been working at the forefront of the international community and has its own methods for exploring dark matter. After reaching a cooperation agreement, their detectors were transported to the ern for testing. The test results showed that their detection method is indeed feasible.

This is also the reason why Dr. Evans got the article in advance. He had dealt with the Purple Mountain Space Astronomy Laboratory before; after the detection, they used ati to conduct three observations, and during the observation process, they conducted

The energy resolution has been increased by 2 times and the background has been reduced by 5 times.

Two of these three observations were successful. One failed because of the balloon! During these two successful observations, they collected a large amount of effective data. Through the analysis of these data, they found that the electron energy spectrum was at an energy of 3000-8000tev.

interval, compared with the theoretical results, there is a strong "super". Analysis shows that this "super" may be the product of the annihilation of dark matter particles. The observation results are consistent with the kaza-klein particle model (particle mass 6200tev) predicted by the dark matter theory.

very good.

"Professor Lars Bergström, a dark matter expert at Stockholm University in Sweden, has also read this article. He believes that the observation data of ati are very consistent with the data collected by the European Pamela dark matter detector! On the one hand, ati measurements

The sum of electron and positron fluxes, on the other hand, measures higher energy

The range increased, and the flow rate decreased, so from the ati measurement results, the current detection results are more like the annihilation of dark matter particles." Dr. Evans' voice became excited as he spoke, "This is the first time that humans have discovered dark matter.

The evidence of particle annihilation will greatly promote the study of dark matter!"

"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 piece of evidence for the existence of dark matter! The bad news is that the dark matter particles discovered this time

The existing energy range is too high, completely beyond the design range of lh! It does not seem to have a direct promotion effect on my experimental plan!"

The energy level of lh is only 14tev, the American SS that was cut off is only 40tev, and the upcoming Chinese ep project is only 50-70tev. It is completely impossible to reach the energy level in this observation data; so how do you use this?

Where’s the news? (To be continued.)
Chapter completed!