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Are there more than 3 generations of particles in the Standard Model?

physics.stackexchange.com/questions/2051/why-do-we-think-there-are-only-three-generations-of-fundamental-particles on Physics Stack Exchange

Video 1. PHYS 485 Lecture 5: Standard Model and Feynman Diagrams by Roger Moore (2016) Source. www.youtube.com/watch?v=AKtN6ajjSQo&t=1474 gives an argument why there might only be 3 generations of particles.

 Ancestors