Recently, I've been watching Neutrino. Although it is known as a popular science book of cutting-edge science, the content really has no depth. However, I was thinking about a problem. That is, why can neutrinos pass through objects? About it, I asked professional people. But I didn't get a satisfactory one. So, let's get to the floor! Mizukawa said.

First, we need to know where neutrinos come from. It is said that physicists in those years did not satisfy the law of conservation of energy when they measured energy during β decay. People don't know where that energy goes, and they talk about it. The people at that time were divided into two factions. The Copenhagen School, represented by Bohr, asserts that the law of conservation of energy is not entirely correct, and it is inconsistent with the decay of β. The other group is the unidentified particles led by Dirac, which are actually neutrinos. Dirac discovered the neutrino, but did not find a suitable name for it. Since neutrinos are created from the decay of β, they are destined to be extraordinary. Because of this, it can pass through objects. Dueñas was the first to speak, saying something he knew.

No, haven't you heard of electron neutrinos? Electrons can also produce neutrinos, but you can't always say that neutrinos are special because of this, right? Margarita asked.

People on the Internet say that it is because neutrinos are leptons, and leptons do not participate in strong interactions, but only in weak interactions. Du said.

Going with the flow is the saddest thing for people. People say so, but have you ever thought about it? A very simple question: electrons are also leptons, so why can't they pass through objects? Can they answer this question? Apparently not. Some people say that electrons can be scattered, but I've searched for electron scattering that only happens when sound travels. There is also μ that is also lepton, and its half-life is only 2.2 microseconds. In other words, it begins to decay within a very short time after its formation. After decay, it becomes an electron, an anti μ, and a μ neutrino. Note that decay produces neutrinos in turn. It is said that electrons can also produce electron neutrinos under certain conditions. If I remember correctly, it should be decay. It is precisely because it is a product of decay that it can pass through the object. What Margarita said was unexpected.

Electrons are the product of the decay of μ atoms, why can't they pass through objects? So, decay is not the reason why neutrinos can pass through objects. I think the reason is that the quality is small. Not to say it's minimal, of course. The rest mass of the neutrino is not zero, but the rest mass of the photon is zero. Why can't you pass through an object if the rest mass is zero? Because it is this zero that causes the photon to be unstable, there is an urgent need to find a carrier. Quarks have a non-zero rest mass, but they are still lighter than neutrinos. So, why can't quarks pass through objects? That's because it's a constituent particle, just like an electron. Unless there is an object whose constituent particles are not quarks, quarks cannot pass through them. The six sons of the wind are chaotic and incoherent.

After listening to this, Mizukawa said, "I think that although neutrinos are leptons, they do not necessarily participate in weak interactions. Or, in general, it does not participate in weak interactions. Of course, it is possible to participate. The range of weak interactions is small. Even then, weak interactions did not occur. Therefore, neutrinos can pass through objects. I wonder if you think my point of view is correct??

After hearing this, the three of them all said: You are really a good player.

……。