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damian081
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Am I correct in my understanding that the standard model predicts that there should be more matter than antimatter in the universe, but not the dominant proportion that is observed? Is that the basic problem?
Yes.damian081 said:Am I correct in my understanding that the standard model predicts that there should be more matter than antimatter in the universe, but not the dominant proportion that is observed? Is that the basic problem?
No, at least one reason for the matter-antimatter imbalance is that certain reactions (weak decays) go at different rates than their anti- versions. As you said, the known instances of this are not sufficient in themselves to explain the large matter-antimatter imbalance.damian081 said:Does the standard model predict this disparity because the interactions of the strong force are more statistically likely than those of the weak force?
Bill_K said:Yes.
No, at least one reason for the matter-antimatter imbalance is that certain reactions (weak decays) go at different rates than their anti- versions. As you said, the known instances of this are not sufficient in themselves to explain the large matter-antimatter imbalance.
CP violation is a phenomenon in particle physics where the combined symmetry of charge conjugation (C) and parity (P) is violated. This means that certain processes in particle interactions behave differently when time is reversed, violating the fundamental symmetry of physics.
CP violation was first observed in 1964 by James Cronin and Val Fitch in experiments involving the decay of neutral kaons. They found that the decay rates of neutral kaons and their antiparticles were not equal, indicating a violation of CP symmetry.
CP violation is important because it helps to explain the matter-antimatter asymmetry observed in our universe. According to the Big Bang theory, equal amounts of matter and antimatter should have been created in the early universe, but this is not the case. CP violation provides a possible explanation for this imbalance.
CP violation is measured by studying the decay of particles and looking for differences in the decay rates of particles and their antiparticles. This can be done using high-energy particle colliders, such as the Large Hadron Collider, or through precision measurements of particle decays in experiments such as the Belle II experiment.
Yes, CP violation is included in the Standard Model of particle physics, which is the currently accepted theory that describes the fundamental particles and their interactions. However, the amount of CP violation predicted by the Standard Model is not enough to explain the observed matter-antimatter asymmetry, so further research is still being done to understand this phenomenon.