ELI5: Explain Like I'm 5

Cabibbo–Kobayashi–Maskawa matrix

Okay kiddo, Have you heard of particles? Scientists study them and try to understand how they work. There are two very tiny particles called quarks that are inside protons and neutrons in an atom.

Now, imagine we are building a house with blocks. We need to know the different colors, shapes, and sizes of the blocks we have to create the house. Similarly, scientists need to know the different types of quarks that exist and how they combine to create different types of particles.

The Cabibbo-Kobayashi-Maskawa matrix (CKM matrix) helps scientists understand how quarks mix and change from one type to another while they are inside a particle.

You see, quarks can change their "flavors" as they interact and "dance" with one another. Just like we can mix paints to create new colors, quarks mix with each other to create new particles.

The CKM matrix helps scientists keep track of the probabilities of different types of quarks transforming into other types when they interact. It's like a big chart that tells scientists which quarks are more likely to turn into which other quarks.

So, the CKM matrix is a very important tool for scientists to understand how particles are made up of quarks and how those quarks change and interact with each other.