5 papers
A localisation bound for Standard-Model representations in heterotic orbifolds
Navid Ardakanian
In heterotic string compactifications on toroidal orbifolds, the massless states at a twisted fixed point are constrained by the evenness of the sixteen-dimensional gauge lattice.…
The exact column texture: tree-level Yukawa universality in heterotic orbifolds
Navid Ardakanian
On heterotic orbifolds where three quark generations arise from fixed-point triplication, we prove that the leading-order tree-level Yukawa amplitude -…
Why Quarks and Leptons Demand Different Symmetries: A Systematic Froggatt-Nielsen Analysis
Navid Ardakanian
We present a systematic analysis of a minimal supersymmetric discrete flavor symmetry as a solution to the fermion mass hierarchy problem. With generation-dependent cha…
Mass Hierarchies Without Mixing: Abelian Froggatt-Nielsen Models with Uncharged Left-Handed Doublets
Navid Ardakanian
Abelian flavor charges on right-handed fermions produce left-handed anarchy: we prove that all abelian discrete Froggatt-Nielsen models with uncharged left-handed doublets yield Ha…
From seesaw over-suppression to trimaximal mixing: why is the minimal resolution of the neutrino failure
Navid Ardakanian
We investigate whether the type-I seesaw mechanism can rescue the Froggatt--Nielsen framework for neutrinos and find that it cannot. With right-handed Majorana masses carryin…