What is the origin of C,P and CP violations?

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In summary, the CP symmetry violation is deduced from the mixing three quark generations. The mass eigenstates are different from the flavor eigenstates, and if a specific flavor eigenstate is produced, it is a superposition of the mass eigenstates, and their relative phases change with time, giving components of other quarks. Alternatively, exchanging (2) virtual W bosons causes mixing.
  • #1
ndung200790
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The C and P symmetry violations are deduced from the separating the right-handed representation from left-handed representation in electroweak model(Weinberg theory).Then I do not understand why we can consider the left-handed fermions living in a representation separating with that of right-handed fermions if it is not because of neglecting the mass of fermions in weak interaction(can we neglecting the mass?)?

The CP symmetry violation is deduced from the mixing three quark generations.Then I do not understand what allows the mixing of the three quarks?
 
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AFAIK, mass is not neglected. The point is that electroweak interaction only couples to electrons and neutrinos of one handedness. If the particles are massive, Then the energy eigenstates are 50-50 superpositions of chiral eigenstates but the particles produced in weak interaction aren't energy eigenstates.
 
  • #3
ndung200790 said:
Then I do not understand what allows the mixing of the three quarks?
The mass eigenstates are different from the flavor eigenstates. If a specific flavor eigenstate is produced, it is a superposition of the mass eigenstates, and their relative phases change with time, giving components of other quarks.
Alternatively, you can describe mixing as the exchange of (2) virtual W bosons.
 
  • #4
Why do you have to say their relative phase must be changed ''in time''?

Please elaborate the explaining the mixing caused by exchange (2) virtue W.Is it correct if I think that one generation of quarks can transforms to other generation of quarks by exchange virtue W bosons?Then we can(?) consider different flavor quarks can ''combine with each other''.Then what is the condition for applying superposition principle?
 
  • #5
What suggests us about in electroweak interaction the fermions couple with only one handedness?
 
  • #6
ndung200790 said:
What suggests us about in electroweak interaction the fermions couple with only one handedness?

There was a classic experiment by Wu who observed polarisation in beta decay.
 
  • #7
Then what is the first theoretical idea about the handedness asymmetry?(I mean the motivate idea for the experiment)?
 
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Related to What is the origin of C,P and CP violations?

1. What is C, P, and CP violation?

C, P, and CP violation are phenomena in particle physics where certain symmetries are broken, leading to differences in the behavior of particles and their antiparticles. C refers to charge conjugation, P refers to parity, and CP refers to the combined operation of charge conjugation and parity.

2. How were these violations first discovered?

C, P, and CP violations were first discovered in the 1950s and 1960s through experiments studying the behavior of neutral kaon particles. These particles were found to decay differently than their antiparticles, indicating a violation of CP symmetry.

3. What is the origin of these violations?

The origin of C, P, and CP violations is still not fully understood. It is believed that these violations arise from differences in the behavior of matter and antimatter, which is known as the CP problem. Some theories suggest that these violations may be linked to the asymmetry between matter and antimatter in the early universe.

4. How are these violations relevant in modern physics?

C, P, and CP violations are important in understanding the fundamental laws of physics. The Standard Model of particle physics, which describes the behavior of subatomic particles, incorporates these violations. Studying these violations can also provide insights into the nature of matter and antimatter and the early universe.

5. What current research is being done on C, P, and CP violations?

Scientists are continually conducting experiments and studies to further understand C, P, and CP violations. This includes exploring the behavior of particles at high energy colliders, such as the Large Hadron Collider, and studying the properties of neutrinos. Researchers are also working to develop more precise measurements and theories to better explain the origin of these violations.

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