Conveners
Early Universe
- Seyda Ipek
Mounting evidence suggests that planned and present gravitational-wave detectors may be sensitive to signatures from first-order phase transitions in the early universe. Here, we investigate the influence of heavy vector-like fermions on the phase transition. Specifically, we consider the recently-proposed "flavour transfer" model, where the SM flavour structure is augmented by a new...
Recently, there has been a lot of attention given to cosmological first-order phase transitions in various contexts. To achieve a strong first-order phase transition a flat symmetry-breaking potential is commonly required. For instance, a classically scale invariant potential can provide such a flat potential, $V \sim \phi^4 \log \phi$, albeit with a large dilution factor and run-away bubbles....
The mass hierarchy problem is concerned with the large differences in scale present in our universe, namely between the Higgs mass ($125$ GeV) and the Planck mass ($10^{19}$ GeV). The Standard Model currently offers no explanation for this difference which prompts the investigation of other fundamental theories. It has been argued that scale invariance of physical laws may be a solution to...
We present a minimal framework that realises successful Dirac Leptogenesis through the Affleck-Dine mechanism. A single right-handed neutrino and a neutrinophillic Higgs doublet are introduced to the Standard Model, which couple via a Yukawa interaction. The inflationary setting is induced by a combination of the two Higgs doublets, with their global symmetry violating interactions leading to...
Is it possible to get leptogenesis to work in the Zee Model? Come to this talk and find out!
