Summary
To account forCP violation in the preon model with one generation, it is necessary to extend a scalar phase factor to a matrix. However,CP is violated in more than two generations, even if a phase factor is a scalar. Especially, we can observeCP violation in the preon model with three generations.
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Okamoto, Y., Sugita, K. & Sekine, M. CP violation in preon model with three generations. Nuov Cim A 108, 371–374 (1995). https://doi.org/10.1007/BF02787062
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DOI: https://doi.org/10.1007/BF02787062