162 citations · 923 across the 32 of their papers we have counts for
34 papers
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…
Can the universe be matter-dominated after a supercooled first-order phase transition?
Henda Mansour, Yann Gouttenoire, Felix Kahlhoefer
We show that the answer is generally no, at least not immediately. Bubble collisions leave behind a highly inhomogeneous scalar field with persistent relativistic gradients, produc…
GUEST: Gravitational Universe Exploration with Satellite Tracking. A passive satellite laser-ranging mission for the dark gravitational Universe
Diego Blas, Aurélien Hees, F. Javier Atapuerca +78
GUEST is a space mission concept whose central objective is the detection of gravitational waves (GWs) in the microhertz band -- a physics-rich frequency window that no other prese…
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…
The Dark Side of the Moon: Listening to Scalar-Induced Gravitational Waves
D. Blas, J. W. Foster, Y. Gouttenoire +4
The collapse of large-amplitude primordial curvature perturbations into planetary-mass primordial black holes generates a scalar-induced gravitational wave background in the Hz…
Closing the Mass Window for Stupendously Large Black Holes
Christopher Gerlach, Yann Gouttenoire, Antonio J. Iovino +1
We show that primordial black holes (PBHs) in the mass range () produce isocurvature perturbations exceeding cu…
Implications for Pulsar Timing Arrays of Sub-solar Black Hole Detections: From LVK to Einstein Telescope and Cosmic Explorer
Yann Gouttenoire, Sokratis Trifinopoulos, Miguel Vanvlasselaer
The detection of compact binary mergers with sub-solar masses at gravitational-wave observatories could mark the groundbreaking discovery of primordial black holes (PBHs). Concurre…
WIMPs and new physics interpretations of the PTA signal are incompatible
Yann Gouttenoire
In order to explain the large amplitude of the nano-Hertz stochastic gravitational wave background observed in pulsar timing arrays (PTA), primordial sources must be particularly e…
Direct Detection of Ultralight Dark Matter via Charged Lepton Flavor Violation
Innes Bigaran, Patrick J. Fox, Yann Gouttenoire +4
We propose a dark matter direct-detection strategy using charged particle decays at accelerator-based experiments. If ultralight dark matter has a misalignment…
New Source for QCD Axion Dark Matter Production: Curvature Induced
Cem Eröncel, Yann Gouttenoire, Ryosuke Sato +2
We discuss a novel mechanism for generating dark matter from a fast-rolling scalar field, relevant for both inflation and rotating axion models, and apply it specifically to the (Q…
Curvature Perturbations from First-Order Phase Transitions: Implications to Black Holes and Gravitational Waves
Gabriele Franciolini, Yann Gouttenoire, Ryusuke Jinno
Understanding whether primordial black holes form during strong first-order phase transition (FOPT) is a crucial open question in cosmology. We address this using a fully covariant…
A universal bound on the duration of a kination era
Cem Eröncel, Yann Gouttenoire, Ryosuke Sato +2
We show that primordial adiabatic curvature fluctuations generate an instability of the scalar field sourcing a kination era. We demonstrate that the generated higher Fourier modes…
Cosmological Consequences of Domain Walls Biased by Quantum Gravity
Yann Gouttenoire, Stephen F. King, Rishav Roshan +3
One of the simplest standard model extensions leading to a domain wall network is a real scalar with a symmetry spontaneously broken during universe evolution. Motivated…
Particle shells from relativistic bubble walls
Iason Baldes, Maximilian Dichtl, Yann Gouttenoire +1
Relativistic bubble walls from cosmological phase transitions (PT) necessarily accumulate expanding shells of particles. We systematically characterize shell properties, and identi…
Primordial Black Holes from Conformal Higgs
Yann Gouttenoire
Scale-invariant extensions of the electroweak theory are not only attractive because they can dynamically generate the weak scale, but also due to their role in facilitating superc…
Primordial Black Holes and Wormholes from Domain Wall Networks
Yann Gouttenoire, Edoardo Vitagliano
Domain walls (DWs) are topological defects originating from phase transitions in the early universe. In the presence of an energy imbalance between distinct vacua, enclosed DW cavi…
Heavy Baryon Dark Matter from Confinement: Bubble Wall Velocity and Boundary Effects
Yann Gouttenoire, Eric Kuflik, Di Liu
Confinement in Yang-Mills theories is known to proceed through first-order phase transition. The wall velocity is bounded by due to the need…
First-order Phase Transition interpretation of PTA signal produces solar-mass Black Holes
Yann Gouttenoire
We perform a Bayesian analysis of NANOGrav 15yr and IPTA DR2 pulsar timing residuals and show that the recently detected stochastic gravitational-wave background (SGWB) is compatib…
Scrutinizing the Primordial Black Holes Interpretation of PTA Gravitational Waves and JWST Early Galaxies
Yann Gouttenoire, Sokratis Trifinopoulos, Georgios Valogiannis +1
Recent observations have granted to us two unique insights into the early universe: the presence of a low-frequency stochastic gravitational wave background detected by the NANOGra…
Domain wall interpretation of the PTA signal confronting black hole overproduction
Yann Gouttenoire, Edoardo Vitagliano
Recently, Pulsar Timing Array (PTA) collaborations have detected a stochastic gravitational wave background (SGWB) at nano-Hz frequencies, with Domain Wall networks (DWs) proposed…
Bubbletrons: Ultrahigh-Energy Particle Collisions and Heavy Dark Matter at Phase Transitions
Iason Baldes, Maximilian Dichtl, Yann Gouttenoire +1
We initiate the study of `bubbletrons', by which we mean ultra-high-energy collisions of the particle shells that generically form at the walls of relativistic bubbles in cosmologi…
Primordial Black Holes from Supercooled Phase Transitions
Yann Gouttenoire, Tomer Volansky
Cosmological first-order phase transitions (1stOPTs) are said to be strongly supercooled when the nucleation temperature is much smaller than the critical temperature. These are of…
Primordial Black Hole Archaeology with Gravitational Waves from Cosmic Strings
Anish Ghoshal, Yann Gouttenoire, Lucien Heurtier +1
Light primordial black holes (PBHs) with masses smaller than g () evaporate before the onset of Big-Bang nucleosynthesis, rendering their detection rather…