Symmetries and Quark Model

This lecture covers the symmetries and the quark model, focusing on the representation of antiquarks and mesons, construction of meson states from up/down quarks, and the SU(3) flavor symmetry including the strange quark. It explains the ladder operators, the formation of light ud mesons, and the combination of uds quarks to form baryons. The lecture also discusses the pseudoscalar and vector mesons, the baryon decuplet and octet, and concludes by highlighting the importance of flavor symmetries in explaining the observed multiplet structure for mesons and baryons.