Flavour puzzle or Why neutrinos are different?

TL;DR

This paper reviews a 6D model that elegantly addresses the flavor puzzle of the Standard Model, explaining fermion mass hierarchies, neutrino properties, and offering testable phenomenological predictions.

Contribution

It introduces a novel 6D framework where three fermion generations derive from a single family, unifying flavor explanations and phenomenology.

Findings

Explains fermion mass hierarchies naturally

Accounts for small quark mixings and large neutrino mixings

Proposes phenomenological tests to distinguish the model

Abstract

We present a short review of a 6-dimensional model where a flavour puzzle of the Standard Model fermions finds an elegant solution. The mechanism is based on an idea that the three fermionic generations originate from a single 6D family. The model explains in a natural way both charged fermions mass hierarchy and small mixings in the quark sector, and tiny neutrino masses and large neutrino mixings. We also discuss some phenomenological aspects of the model which can distinguish this class of the models from another one and can help to look for manifestations of new physics at colliders and other experiments.