The Majorana nature of neutrinos is strongly motivated from the theoretical and
phenomenological point of view. A plethora of neutrino mass models, known collectively as …

A bstract Grand Unified Theories (GUT) predict proton decay as well as the formation of
cosmic strings which can generate gravitational waves. We determine which non …

We examine many SO (10) models for their viability or otherwise in explaining all the fermion
masses and mixing angles. This study is carried out for both supersymmetric and …

Baryon number conservation is not guaranteed by any fundamental symmetry within the
standard model, and therefore has been a subject of experimental and theoretical scrutiny …

A bstract We propose a non-supersymmetric E 6 GUT with the scalar sector consisting of
650⨁ 351′⨁ 27. Making use of the first representation for the initial symmetry breaking to …

Unlike minimal SU (5), SO (10) provides a straightforward path towards gauge coupling
unification by modifying the renormalization group evolution of the gauge couplings above …

We review SO (10) grand unified theories (GUTs) in four and five dimensions (4D and 5D).
The renormalizable minimal SO (10) SUSY GUT is the central theme of this paper. It is very …

A bstract We show that in SO (10) models, a Yukawa sector consisting of a real 10 H, a real
120 H and a complex 126 H of Higgs fields can provide a realistic fit to all fermion masses …

A bstract AZ 2 symmetry that extends the weak interaction, SU (2) L→ SU (2) L× SU (2)′,
and the Higgs sector, H (2)→ H (2, 1)+ H′(1, 2), yields a Standard Model quartic coupling …

A bstract We perform numerical fits of Grand Unified Models based on SO (10), using
various combinations of 10-, 120-and 126-dimensional Higgs representations. Both the …