This review article provides a pedagogical introduction into various classes of chiral string
compactifications to four dimensions with D-branes and fluxes. The main concern is to …

▪ Abstract We provide a pedagogical introduction to a recently studied class of
phenomenologically interesting string models known as Intersecting D-Brane Models. The …

We study the lepton flavor models, whose flavor symmetries are finite subgroups of the
modular group such as S 3 and A 4. In our models, couplings are also nontrivial …

A bstract We revisit the flavor symmetries arising from compactifications on tori with magnetic
background fluxes. Using Euler's Theorem, we derive closed form analytic expressions for …

Abstract Models with modular flavor symmetries have been thought to be highly predictive.
We point out that these predictions are subject to corrections from non–holomorphic terms in …

We review the modular flavor symmetric models of quarks and leptons focusing on our
works. We present some flavor models of quarks and leptons by using finite modular groups …

We study the origin of non-Abelian discrete flavor symmetries in superstring theory. We
classify all possible non-Abelian discrete flavor symmetries which can appear in heterotic …

It is known that hidden U (1) gauge factors can couple to visible U (1) s through kinetic
mixing. This phenomenon is shown to occur in non-supersymmetric string set-ups, between …

We calculate various tree-level (disk) scattering amplitudes involving gauge, matter and
moduli fields in IIB toroidal orbifold/orientifold backgrounds with D9-, D5-respectively D7 …

The state of the art in D‐brane model building is briefly reviewed, focusing on recent
achievements in the construction of D= 4 𝒩= 1 type II string vacua with semi‐realistic gauge …