2. Super-symmetry (1971-73) symmetry between quarks, leptons and force carriers? i.e. symmetry between and ? fermions bosons each fermion had a bosonic partner (squarks and sleptons) each boson had a fermionic partner (photinos, gluions etc) since these particles not observed super-symmetry = broken symmetry SUSY unification of electro-weak and QCD: much better than GUT theoretically - less infinities - less renormalization - more natural -hints of role for gravity supergravity – 3. Super-gravity attempts to unify all four fundamental interactions Theories of Everything (ToE) and electromagnetism Kaluza (1921): ‘unified’ GR Wrote GR in 5 dimensions, em appears naturally Klein (1927): converted Kaluza theory to quantum field theory Einstein; attemoted to generalize
2. Super-symmetry (1971-73) symmetry between quarks, leptons and force carriers? i.e. symmetry between fermions and bosons ? each fermion had a bosonic partner (squarks and sleptons) each boson had a fermionic partner (photinos, gluions etc) since these particles not observed super-symmetry = broken symmetry SUSY unification of electro-weak and QCD: much better than GUT theoretically - less infinities - less renormalization - more natural -hints of role for gravity – supergravity 3. Super-gravity attempts to unify all four fundamental interactions Theories of Everything (ToE) Kaluza (1921): ‘unified’ GR and electromagnetism Wrote GR in 5 dimensions, em appears naturally Klein (1927): converted Kaluza theory to quantum field theory Einstein; attemoted to generalize
fintroduction-to-particle-physics21.docx