This is a review article about neutrino mass and mixing and flavour model building
strategies based on modular symmetry. After an introduction to neutrino mass and lepton …

The neutrino sector offers one of the most sensitive probes of new physics beyond the
Standard Model of Particle Physics (SM). The mechanism of neutrino mass generation is still …

Over the past three decades, considerable effort has been devoted to studying the rich and
diverse phenomenologies of heterotic strings exhibiting spacetime supersymmetry …

We construct non-supersymmetric $ AdS_3 $ solutions of the $\mathrm O (16)×\mathrm O
(16) $ heterotic string. Most of the backgrounds have a classical worldsheet definition but …

We investigate the structure of the moduli space of 9D heterotic interpolating models with a
complete set of Wilson line backgrounds and a radius parameter by computing the one-loop …

We present explicit examples of semi-realistic heterotic models with spontaneously broken
supersymmetry, which dynamically lead to breaking scales much smaller than M Planck and …

A bstract We consider heterotic string theories in nine and eight dimensions. We identify the
disconnected part of the spacetime gauge group by studying the outer automorphism of the …

A bstract This article discusses model-building scenarios including anti-D3-/D7-branes, in
which supersymmetry is broken spontaneously, despite having no scale at which sparticles …

We use the free fermionic formulation of the heterotic string in four dimensions to study the
vacuum structure and energy of nonsupersymmetric tachyon free models that correspond to …

The heterotic-string models in the free fermionic formulation gave rise to some of the most
realistic-string models to date, which possess N= 1 N= 1 spacetime supersymmetry. Lack of …