5. Theoretical Physics (CSN4)

A Grand-Unified Nelson-Barr Model

by Robert ZIEGLER (CERN)

Europe/Rome
Aula Seminari (LNF)

Aula Seminari

LNF

Via Enrico Fermi, 40 00044 Frascati (Roma)
Description
I will discuss the structure of the Nelson-Barr approach to the strong CP Problem, and argue that these solutions can be naturally embedded into E6 Grand-Unified Theories, since the E6 fundamental contains all necessary fermions.The main benefit of the unified structure is the predictivity in the SM fermion sector, and a perfect fit to all SM observables can be obtained despite being over-constrained. Definite predictions are made for the neutrino sector, with a Dirac CP phase that is correlated to the CKM phase, allowing to test this model in the near future.
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