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Utg
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Hello! I have heard many times that CP violation in the SM is due to the presence of phase in the CKM matrix. Can somebody explain how phase is related to CP violation?
Thanks!
Thanks!
mfb said:If you exchange C and P all the amplitudes of individual processes stay the same. The probability is linked to the squared amplitude. So how do you get an asymmetry at all? The only way to do this is via phases: Some processes keep their phase under CP (EM/strong interaction), some get a different phase (weak interaction). If you have at least two processes that contribute to the overall amplitude, and their phases transform differently under CP, you can get an actual asymmetry.
mfb said:C changes particles with antiparticles.
CP violation refers to a phenomenon in particle physics where the laws of physics are not symmetric under the combined transformations of charge conjugation (C) and parity (P). This means that the behavior of particles and their antiparticles are not identical, and this violation is observed in certain processes involving subatomic particles.
In the context of CP violation, phase refers to the difference in the weak interaction between a particle and its antiparticle. This phase can affect the decay rates of particles and is a key factor in understanding CP violation.
CP violation is measured through experiments that analyze the decay rates of particles and their antiparticles. By comparing the decay rates, scientists can determine if there is a difference in behavior between particles and antiparticles, indicating CP violation.
CP violation is significant because it helps explain why there is more matter than antimatter in the universe. According to the Big Bang theory, equal amounts of matter and antimatter should have been created, but this is not observed. CP violation is one of the mechanisms that could explain this asymmetry.
No, CP violation is a phenomenon that occurs at the subatomic level and cannot be observed in everyday life. It requires specialized equipment and experiments to detect and measure CP violation in particles.