Conveners
Parallel Session Wednesday: Gravitational waves/phase transitions session
- Laura Sagunski
While first order phase transitions (FOPTs) have been extensively studied as promising cosmological sources of gravitational waves, the phenomenon of particle production from the expansion and collision of bubbles has received relatively little attention in the literature. Previous works have only considered semi-analytical estimates of this effect in simplified settings and have therefore...
We consider black hole formation due to the gravitational collapse produced by large density fluctuations during an epoch of reheating with a stiff equation of state, and calculate the corresponding signal in the induced gravitational wave spectrum. By considering the existing Big Bang nucleosynthesis and CMB bounds on the total energy density of gravitational waves today, we find the...
We study the inflection point inflation generated by polynomial superpotential and canonical K\"ahler potential under the supergravity framework, where only one chiral superfield is needed. We find the special form of the scalar potential limits the possible Hubble value up to $\mathcal{O}(10^{10}) \, \textrm{GeV}$ and the inflaton mass to $\mathcal{O}(10^{11}) \, \textrm{GeV}$. We obtained...
