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Probing the scale of grand unification with gravitational waves
Wilfried Buchmuller, Valerie Domcke, Hitoshi Murayama +1
The spontaneous breaking of U(1)_B-L around the scale of grand unification can simultaneously account for hybrid inflation, leptogenesis, and neutralino dark matter, thus resolving…
Trans-Planckian Censorship and Inflation in Grand Unified Theories
Kai Schmitz
The recently proposed trans-Planckian censorship conjecture (TCC) amounts to the claim that inflation models with an inflationary energy scale larger than Lambda_inf^max ~ 10^9 GeV…
A fresh look at the gravitational-wave signal from cosmological phase transitions
Tommi Alanne, Thomas Hugle, Moritz Platscher +1
Many models of physics beyond the Standard Model predict a strong first-order phase transition (SFOPT) in the early Universe that leads to observable gravitational waves (GWs). In…
Type-I Seesaw as the Common Origin of Neutrino Mass, Baryon Asymmetry, and the Electroweak Scale
Vedran Brdar, Alexander J. Helmboldt, Sho Iwamoto +1
The type-I seesaw represents one of the most popular extensions of the Standard Model. Previous studies of this model have mostly focused on its ability to explain neutrino oscilla…
Imprint of a scalar era on the primordial spectrum of gravitational waves
Francesco D'Eramo, Kai Schmitz
Upcoming searches for the stochastic background of inflationary gravitational waves (GWs) offer the exciting possibility to probe the evolution of our Universe prior to Big Bang nu…