3 papers
astro-ph.CO2024
Dual Gravitational Wave Signatures of Instant Preheating
Wei-Yu Hu, Kazunori Nakayama, Volodymyr Takhistov +1
In the instant preheating scenario efficient particle production occurs immediately following the period of inflationary expansion in the early Universe. We demonstrate that instan…
hep-ph2024
Gravitational Wave Probe of Planck-scale Physics After Inflation
Weiyu Hu, Kazunori Nakayama, Volodymyr Takhistov +1
Particle decays are always accompanied by the emission of graviton quanta of gravity through bremsstrahlung processes. However, the corresponding branching ratio is suppressed by t…
astro-ph.CO2023
Gravitational Waves from Preheating in Inflation with Weyl Symmetry
Wei-Yu Hu, Qing-Yang Wang, Yan-Qing Ma +1
Inflation with Weyl scaling symmetry provides a viable scenario that can generate both the nearly scaling invariant primordial density fluctuation and a dark matter candidate. Here…