# COST Workshop on Higgs and Flavour Physics: Present and Future

Jan 14 – 17, 2019
IST, Lisboa, Portugal
Europe/Lisbon timezone

## Spontaneous CP and Scalar FCNC in a 2HDM

Jan 15, 2019, 4:50 PM
20m
Anfiteatro Abreu Faro (IST, Lisboa, Portugal)

### Anfiteatro Abreu Faro

#### IST, Lisboa, Portugal

Av Rovisco Pais 1049-001 Lisboa Portugal

### Speaker

Miguel Ruben Nebot Gomez

### Description

A viable Two Higgs Doublet Model with CP violation of spontaneous origin is presented. In this model, based on a generalised Branco-Grimus-Lavoura model with a flavoured $Z_2$ symmetry, the lagrangian respects CP invariance, while the vacuum has a CP violating phase, which is able to generate a complex CKM matrix. Scalar mediated flavour changing neutral couplings are analysed, stressing the connection between the generation of a complex CKM matrix and the unavoidable presence of scalar FCNC. The scalar sector is also presented in detail, showing that the new scalars are necessarily lighter than 1 TeV. Finally, a phenomenological analysis of the model including the most relevant constraints is discussed, exploring, in particular, definite implications for the observation of New Physics signals.