Sommaire:

I will discuss the role of the orthogonal groups in high energy physics, and present some modern applications to particle phenomenology.
After a brief introduction to the Standard Model structure, I will focus on the custodial symmetry SO(4) and its implications.
I will then introduce models where the Higgs boson is a composite, pseudo-Nambu-Goldstone boson, in the coset space SO(6)/SO(5).
The associated spectrum of new particles will be discussed.
Finally, I will illustrate two applications of the group SO(10) for theories of Grand Unification: a model for predictive baryogenesis via leptogenesis,
and the possibility to realise gauge unification in the composite Higgs scenario.

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Pour plus d'informations, merci de contacter Frigerio M.