Comment: 26 pages, 1 figure, discussions and references added, accepted for publication in JHEP

<p>We study a version of Starobinsky-like inflation in no-scale supergravity (SUGRA) where a Polonyi term in the hidden sector breaks supersymmetry (SUSY) after inflation, providing a link between the gravitino mass and inflation. We extend the theory to the visible sec...

In an attempt to unfold (if any) a possible connection between two apparently uncorrelated sectors, namely neutrino and dark matter, we consider the type-I seesaw and a fermion singlet dark matter to start with. Our construction suggests that there exists a scalar field...

Comment: v1: 18 pages, 4 figures; v2: 20 pages, 4 figures. Expanded discussion of results, with new figures; v3: 22 pages, 4 figures. Version accepted in JHEP, new fit added

Proton decay is a smoking gun signature of Grand Unified Theories (GUTs). Searches by Super-Kamiokande have resulted in stringent limits on the GUT symmetry breaking scale. The large-scale multipurpose neutrino experiments DUNE, Hyper-Kamiokande and JUNO will either dis...

Comment: 32 pages, 12 figures

We discuss a minimal flavor model with twin modular symmetries, leading to trimaximal <math><mrow><msub><mrow><mi>TM</mi></mrow><mrow><mn>1</mn></mrow></msub></mrow></math> lepton mixing in which the first column of the tri-bimaximal lepton mixing matrix is preserved. T...

In order to address this question, we consider a simple renormalizable and gauge invariant model in which the <math><msup><mi>Z</mi><mo>′</mo></msup></math> only has couplings to the electron and muon and their associated neutrinos, arising from mixing with a heavy vect...

Comment: 35 pages, 9 figures. arXiv admin note: text overlap with arXiv:1903.12588

This work considers the remarkable suggestion that the three families of quarks and leptons may be unified, together with the Higgs and gauge fields of the Standard Model (SM), into a single "particle", namely the $\textbf{248}$ vector superfield of a ten-dimensional $E...