4 papers · 1 filter
Big Bang Nucleosynthesis Confronts Domain Walls and First-Order Phase Transitions as the Pulsar Timing Array Explanations
Fatemeh Elahi, Diego Fortini, Yann Gouttenoire +2
Pulsar timing arrays (PTAs) have detected a nanohertz gravitational-wave background, often attributed to annihilating domain walls (DWs) or first-order phase transitions (FOPTs). T…
Opening the Window of Ultra-Light PBHs by Exorcising the Poltergeist
Yann Gouttenoire, Nicholas Leister, Pedro Schwaller
The hot Big Bang may have emerged from evaporation of primordial black holes (PBHs) lighter than g. Standard monochromatic treatments predict nearly simultaneous evaporation,…
Gravitational Waves from Black Hole Reheating: The Scalar-Induced Component
Yann Gouttenoire, Nicholas Leister, Pedro Schwaller
The reheating of the universe by the evaporation of light primordial black holes (PBHs) can leave a stochastic gravitational-wave (GW) background in the early Universe. In the mono…
Complete Two-loop Renormalization Group Equation of the Weinberg Operator
Alejandro Ibarra, Nicholas Leister, Di Zhang
We calculate the renormalization group equation (RGE) of the lepton-number-violating Weinberg operator with the particle content of the Standard Model (SM), thus completing the set…