FLASY 2022 - 9th Workshop on Flavour Symmetries and Consequences in Accelerators and Cosmology

Session

Parallel Session II.2

30 Jun 2022, 16:45

Conveners

Parallel Session II.2

• Michael Ratz

26. The hidden side of scalar-triplet models with spontaneous CP violation

Bernardo Lopes Gonçalves

30/06/2022, 16:45

The Standard Model of particle physics is in remarkable agreement with most experimental data so far. However, a lot of questions remain unanswered, such as the origin of neutrino masses or the need for extra sources of CP violation. Possible solutions rest on scalar sector extensions, popular beyond-the-Standard-Model scenarios. The addition of scalar triplets is an attractive possibility,...

11. Phenomenology of a flavoured multiscalar BGL-like model with three generations of massive neutrinos

Vasileios Vatellis

30/06/2022, 17:00

In this talk, I will present several possible anomaly-free implementations of the Branco-Grimus-Lavoura (BGL) model with two Higgs doublets and one singlet scalar. The model also includes three generations of massive neutrinos that get their mass via a type-I seesaw mechanism. A particular anomaly-free realization, which we dub νBGL-1 scenario, is subjected to an extensive phenomenological...

35. Neutrino mass and flavor anomalies

shaikh saad (University of Basel)

30/06/2022, 17:15

Experimental hints for lepton flavor universality violation in beauty-quark decay both in neutral- and charged-current transitions require an extension of the Standard Model for which scalar leptoquarks (LQs) are the prime candidates. Besides, these same LQs can resolve the long-standing tension in the muon and the recently reported deviation in the electron $g-2$ anomalies. These tantalizing...

15. Lepton masses from a flavorful Peccei-Quinn-Froggat Nielsen U(1) symmetry

Leon Manuel Garcia de la Vega

30/06/2022, 17:30

We consider a model where a global U(1) symmetry is simultaneously responsible for solving the Strong CP problem à la Peccei-Quinn and for explaining the lepton mass hierarchies à la Froggatt-Nielsen. The axion resulting from the symmetry breaking can have sizeable flavor violating couplings, which propagate to the SM 126 GeV Higgs through scalar mixing. We investigate the bounds from Higgs...

5. Absolute neutrino mass scale and dark matter stability from flavour symmetry

Salvador Centelles Chuliá (MPIK (Heidelberg))

30/06/2022, 17:45

We explore a simple but extremely predictive extension of the scotogenic model. We promote the scotogenic symmetry $\mathbb{Z}_2$ to the flavour non-Abelian symmetry $\Sigma(81)$, which can also automatically protect dark matter stability. In addition, $\Sigma(81)$ leads to striking predictions in the lepton sector: only Inverted Ordering is realised, the absolute neutrino mass scale is...

41. Automatic Nelson-Barr from Gauged Flavor

Pablo Quilez Lasanta (Deutsches Elektronen-Synchrotron (DE))

30/06/2022, 18:00

Despite exceptional appeal of the Peccei-Quinn mechanism, alternative solutions
to the strong CP problem should be pursued. In this direction and given the tight
connection of the strong CP problem with flavor, we explore how a Nelson-
Barr mechanism (NB) arises automatically in the context of gauged flavor models and solves some of the issues of usual NB realizations.