Chapter 107 Neutrinos

Neutrinos are well-known in the world of physics. Although its history is only 100 years old, its impact on the physics community is enormous. Neutrinos originate from an energy theft case, and the protagonist of the story is the famous physicist Pauli. At that time, when studying β decay, energy was always unable to satisfy the conservation law. Physicists are puzzled by this. Pauli pointed out through his research that there is a particle that is even smaller than neutrons, which is named neutrons. Later, physicists changed the name to neutrino, which is the current name. Although Pauli predicted the neutrino, he said that humans would never be able to detect it. However, twenty years later, experimental physicists discovered neutrinos in experiments. Ever since it was discovered, a question has plagued physicists. That is, do neutrinos have a rest mass? Neutrinos move at a speed close to the speed of light and should theoretically have zero mass at rest like photons. Neutrino oscillations, however, show that it has mass. Of course, the reality is more complicated than that. It can be said that the reason why neutrinos are a big hit in particle physics is their ability to penetrate walls. At that time, Pauli was aware of the powerful ability of neutrinos to penetrate walls, so he pessimistically predicted that humans would never discover it. However, although neutrinos can pass through walls, the increasing density of objects can increase the probability that a neutrino will be intercepted. Japan's neutrino detection instruments are built underground. There is a source, and everything is easy to solve. And the sun is the source of neutrinos. In those years, particle physicists even thought of neutrinos released by atomic bombs in order to study neutrinos. Later, they felt it was too dangerous and had to give up.

The advent of neutrinos has made metaphysicians see the like. They claim that neutrinos are the soul of mankind. As long as a person can control the neutrinos in his body, he can control his soul. Although metaphysicians' claim that neutrinos are souls has been scientifically proven, it is not known where the proof came from.

The neutrino earth evolution hypothesis was proposed by Zhang Guowen, a geophysicist in China. We know that neutrinos mostly come from the sun, and neutrinos must carry a lot of energy. This energy accumulates on the earth and gradually forms all things.

On the theoretical side, there is also the two-component neutrino theory and the velocity distribution hypothesis.

Neutrinos have taught me that what is invisible does not mean that it does not exist. We can't see molecules and microorganisms, but they are real.

China also has research on neutrinos, among which Wang Ganchang is the representative. He detected the hydrogen atom through the recoil generated when the electrons in the k-shell were released by the nucleus of the hydrogen atom trapping it. Although he did not detect it directly, he did prove its existence in a way. In the future, China's neutrino business will be much bleaker.

If the host doesn't finish the conversation himself, then it's everyone's time. Although Mizukawa Mizukawa's opening is a bit blunt, it is also very informative.

We can't see neutrinos because they are moving through objects so quickly. If a neutrino is stationary, can we see it? First, it's small. Even if it's still, I'm afraid you can't see it. Second, neutrinos don't have any color. It cannot be seen with the naked eye alone. Neutrinos have a super penetrating ability and can naturally pass through molecular clusters. However, the molecules are in constant motion. Moreover, if the molecular motion is still random and disordered, then the molecule is bound to hit the neutrino. However, the molecule did not hit the neutrino. Is the molecular movement orderly? Of course not, I think there is a range of molecular motion, and molecules can only be within that. The range of the two molecules does not coincide exactly, but rather a blank area. Neutrinos pass through the blank space without colliding with molecules. So does the range dictate the molecule, or does the molecule determine the range? I think it's the scope stimulator, and here's why. If the molecule determines the range, then the molecule can theoretically appear anywhere. How so? Because the molecules are in motion, and they are disordered. Probabilistically, molecules should be present everywhere inside the object. And this is a collision with neutrinos. Du did not prove it strictly logically, but only based on his own intuition.

The quantum tunneling effect is a classical effect in particle physics or quantum mechanics, which describes the situation in which a quantum passes through a potential barrier. From this, I thought of the double-slit interference experiment in optics. Some people say that this experiment directly caused the physics to appear gods and ghosts and the like. You think, two photons are passing through two narrow slits respectively, and the wave interferes. This has left physicists puzzled and puzzled, and has been unable to figure out what the problem is. Two beams of light are separated by a certain distance, why do the waves interfere with each other? From this, it is easy to associate quantum entanglement. In fact, this experiment directly promoted the development of quantum mechanics. Why did I come up with this experiment? That's because the quantum tunneling effect and the double-slit interference experiment are both one-word threads. The former is through the potential barrier, so what is it? We know that nuclear particles such as protons and neutrons are bound by the nucleus, and this bondage is the potential potential. The invisible energy wall formed by the potential is called the potential barrier, and the effect means that a quantum can pass through the potential barrier and enter the nucleus, and I have already said in the experiment. Actually, neutrinos are much smaller than neutrons. Even if you can pass through the barrier, it's not surprising. There is a question: Does the potential barrier completely surround the nucleus? If it is complete, then the quantum crossing is peculiar. If not completely, or if the empty space is small, then it is not surprising that particles such as neutrinos and electrons can pass through. On the other hand, a potential barrier is not a substance but a field. If so, it might make sense.

As neutrinos pass through clusters of molecules, they perfectly enter the blank space. This shows that the movement of neutrinos is actually orderly. If the motion of a neutrino is disordered, it will inevitably hit an object or particle. So, theoretically, humans should have discovered it very early. However, we didn't. So, it should be in order. Liuzifeng looks like he wants to say a lot.。。

Have you ever wondered what kind of neutrinos are passing through our bodies? The encyclopedia says that there are three kinds of neutrinos, electron neutrinos, μ neutrinos, and τ neutrinos. Electron neutrinos have electrons around them, and electrons interact with atoms. When the action is in progress, it illuminates a spherical area. μ neutrinos produce cones of light. Situon neutrinos produce decay. When it appears and disappears, it produces two balls of light, known as a double explosion. From the description of the encyclopedia, none of the three are alike. Still, if you think about it, it's certain. First, the τ neutrino will have a double explosion. That being the case, the neutrinos we see are clearly not like this. The answer lies between the electron neutrino and the μ neutrino, so which is the answer? They all have a word that will, that is to say, possible. However, it does not mean that it is necessarily. Just like an electron neutrino, even if it has electrons around it, it does not necessarily interact with atoms. And I think it's the electron neutrino that is the most likely.

Neutrinos can be produced by π mesons, π which in turn can be produced by thetata and τ mesons. So, are neutrinos produced by theta atoms τ neutrinos? No. Just like several quark compositions are the same, but the number of components that make up is different. In physics, this difference is common. Just like the difference between isotopes and elements, it is not confusing. Margarita's speech wasn't brilliant, but it wasn't bad either.