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26-30 November 2018
Europe/Vienna timezone

Lepton masses and mixing in a two-Higgs-doublet model.

27 Nov 2018, 13:55
25m
Johannessaal

Johannessaal

Austrian Academy of Sciences, Dr.-Ignaz-Seipel-Platz 2, 1010 Vienna, AUSTRIA
Non-Invited Talk [5] Discrete symmetries and models of flavour mixing Discrete symmetries and models of flavour mixing

Speaker

Dr Sebastian Zając (Faculty of Mathematics and Natural Studies, Cardinal Stefan Wyszyński University in Warsaw)

Description

We attempt to find a discrete, non-abelian flavour symmetry which could explain masses and mixing matrix elements of leptons beyond the Standard Model. In our preposition in comparison to the Standard Model there is no need to break flavour symmetry.

With the GAP program, we investigate all finite subgroups of the U(3) group, up to the order of 1025. For the two-Higgs-doublet models we show that there is no group for which it is possible to select free model parameters in order to match the masses of charged leptons, masses of neutrinos and the Pontecorvo-Maki-Nakagawa-Sakata mixing matrix elements (see our recently published paper - links below). We show that the result doesn't depend on the nature and number of neutrinos.

The three Higgs-doublet models calculations are in progress.


Phys Rev. D article: "Lepton masses and mixing in a two-Higgs-doublet model"

ArXiv versionof this aricle [hep/ph:1808.08384]

Content of the contribution Theory

Primary authors

Bartosz Dziewit (University of Silesia) Marek Zralek (University of Silesia) Jacek Holeczek (University of Silesia (PL)) Dr Sebastian Zając (Faculty of Mathematics and Natural Studies, Cardinal Stefan Wyszyński University in Warsaw) Piotr Chaber (University of Silesia in Katowice) Monika Richter (University of Silesia)

Presentation Materials