Lepton masses and mixings in orbifold models with three Higgs families

TL;DR

This paper explores the potential of Z(3) heterotic orbifold models with three Higgs families to realistically describe lepton masses and mixings, including neutrino properties, while avoiding flavor violations.

Contribution

It demonstrates that Z(3) orbifold models can accommodate realistic lepton mass spectra and neutrino mixing patterns without conflicting with current experimental constraints.

Findings

Viable configurations for charged lepton masses are identified.

Models can avoid conflicts with lepton flavor-violating decays.

Multiple mechanisms for neutrino mass generation are possible.

Abstract

We analyse the phenomenological viability of heterotic Z(3) orbifolds with two Wilson lines, which naturally predict three supersymmetric families of matter and Higgs fields. Given that these models can accommodate realistic scenarios for the quark sector avoiding potentially dangerous flavour-changing neutral currents, we now address the leptonic sector, finding that viable orbifold configurations can in principle be obtained. In particular,it is possible to accomodate present data on charged lepton masses, while avoiding conflict with lepton flavour-violating decays. Concerning the generation of neutrino masses and mixings, we find that Z(3) orbifolds offer several interesting possibilities.