# Why Do Pions Decay? Weak Force & Strong Force Explained

• jshoe96
In summary, Pions decay due to the weak force and can be created by smashing any two particles together with enough energy. They are often considered a nuisance in high-energy particle physics experiments.
jshoe96
I heard that (charged) Pions decay due to the weak force, but what does that have anything to do with it? Also, wouldn't the strong force hold them together?

I actually came up with the idea of the Pion on my own before discovering that it had already been discovered.

Also, could they be created by smashing a proton with an anti-neutron or an anti-neutron with a proton?

Thanks.

Have you looked at anything else? Such as this article: http://en.wikipedia.org/wiki/Pion
It and several of the links explain at least a couple of your questions.

jshoe96 said:
Also, could they be created by smashing a proton with an anti-neutron or an anti-neutron with a proton?

If you smash any two particles together with enough energy (enough to create π+π- pairs), you'll get pions. In high-energy particle physics experiments, pions are often a nuisance. They're the "small change" of particle physics.

jtbell said:
In high-energy particle physics experiments, pions are often a nuisance. They're the "small change" of particle physics.

Hey...you hurt my feelings.

## 1. What is the weak force and how does it relate to pion decay?

The weak force is one of the four fundamental forces in nature, along with gravity, electromagnetism, and the strong nuclear force. It is responsible for certain types of radioactive decay, including pion decay. Pions are subatomic particles that are made up of quarks, and they can decay into other particles through the weak force.

## 2. Why do pions decay through the weak force instead of the strong force?

The strong force is responsible for holding together the particles in an atom's nucleus, while the weak force is responsible for the decay of particles. Pions are made up of quarks that are tightly bound by the strong force, but the weak force is still able to overcome this strong binding and cause the pion to decay into other particles.

## 3. How does the weak force interact with particles during pion decay?

The weak force interacts with particles through the exchange of W and Z bosons, which are carriers of the weak force. During pion decay, a W boson is emitted, and it can then decay into other particles, causing the pion to also decay into other particles.

## 4. Can pion decay be explained by the Standard Model of particle physics?

Yes, pion decay is well-explained by the Standard Model, which is a theory that describes the interactions of subatomic particles and the fundamental forces. The Standard Model includes the weak force and its interactions with particles, providing a thorough explanation for pion decay.

## 5. What are the implications of pion decay for our understanding of the universe?

Pion decay is important for our understanding of the universe because it helps us understand the behavior of subatomic particles and the fundamental forces that govern them. It also plays a role in the processes of nuclear fusion and nuclear fission, which are essential for energy production and the formation of elements in stars.

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