Proton anti-proton pair and CP eigenstate

In summary, the p\bar{p} pair is a CP eigenstate with an eigenvalue of 1, due to its C and P eigenstates having eigenvalues of -1 each. However, the p\bar{p} pair may not necessarily produce K_S or K_L, but only \bar{K}^0.
  • #1
merrypark3
30
0
[itex]p\bar{p}[/itex] pair is a CP eigenstate?

As [itex]p[/itex] and [itex]\bar{p}[/itex] are fermions (the pair is assumed to be at S-state), the pair seems to be C's eigenstate with eigenvalue of -1.

As they have opposite intrinsic parity, the pair state seems to be P's eigenstate with eigenvalue -1. Then isn't it CP eigenstate with eigenvalue of 1?

But why the [itex]p[/itex][itex]\bar{p}[/itex] pair cannot produce [itex]K_S[/itex] or [itex]K_L[/itex] but only [itex]\bar{K}^0[/itex]?
 
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  • #2
merrypark3 said:
pbar-p pair is a CP eigenstate?

Not necessarily. The rest of the message assumes this, so there's no point in commenting on it.
 

1. What is a proton-anti-proton pair?

A proton-anti-proton pair is a combination of two subatomic particles, a proton and an anti-proton, which have opposite electric charge. They are often produced in high energy particle collisions, and can be used to study fundamental interactions in particle physics.

2. How are proton-anti-proton pairs formed?

Proton-anti-proton pairs can be formed through high energy collisions between particles, such as in particle accelerators. These collisions create enough energy to produce new particles, including proton-anti-proton pairs.

3. What is a CP eigenstate?

A CP eigenstate is a quantum state that remains unchanged when both charge conjugation (C) and parity (P) operations are applied to it. This means that the state has symmetry under the combined operations of charge conjugation and parity. In the context of proton-anti-proton pairs, this means that the state is the same whether the particles are exchanged or not.

4. Why is studying proton-anti-proton pairs important?

Studying proton-anti-proton pairs can provide insights into the fundamental interactions and symmetries of the universe. It can also help us understand the nature of matter and the origins of the universe. Additionally, proton-anti-proton pairs have important applications in medical imaging and cancer treatment.

5. How do scientists study proton-anti-proton pairs?

Scientists study proton-anti-proton pairs by using high energy particle accelerators to produce them, and then observing the interactions and decays of the particles. They also use advanced detectors and mathematical models to analyze the data and make predictions about the behavior of these particles.

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