359 citations · 907 across the 14 of their papers we have counts for
9 papers · 1 filter
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…
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…
Ultrahigh frequency primordial gravitational waves beyond the kHz: The case of cosmic strings
Géraldine Servant, Peera Simakachorn
We investigate gravitational-wave backgrounds (GWBs) of primordial origin that would manifest only at ultra-high frequencies, from kilohertz to 100 gigahertz, and leave no signal a…
Constraining Postinflationary Axions with Pulsar Timing Arrays
Géraldine Servant, Peera Simakachorn
Models that produce Axion-Like-Particles (ALP) after cosmological inflation due to spontaneous symmetry breaking also produce cosmic string networks. Those axionic strings l…
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…
Kination cosmology from scalar fields and gravitational-wave signatures
Yann Gouttenoire, Geraldine Servant, Peera Simakachorn
Kination denotes an era in the cosmological history corresponding to an equation of state such that the total energy density of the universe redshifts as the sixth inverse p…
Revealing the Primordial Irreducible Inflationary Gravitational-Wave Background with a Spinning Peccei-Quinn Axion
Yann Gouttenoire, Géraldine Servant, Peera Simakachorn
The primordial irreducible gravitational-wave background due to quantum vacuum tensor fluctuations produced during inflation spans a large range of frequencies with an almost scale…
BSM with Cosmic Strings: Heavy, up to EeV mass, Unstable Particles
Yann Gouttenoire, Géraldine Servant, Peera Simakachorn
Unstable heavy particles well above the TeV scale are unaccessible experimentally. So far, Big-Bang Nucleosynthesis (BBN) provides the strongest limits on their mass and lifetime,…
Beyond the Standard Models with Cosmic Strings
Yann Gouttenoire, Géraldine Servant, Peera Simakachorn
We examine which information on the early cosmological history can be extracted from the potential measurement by third-generation gravitational-wave observatories of a stochastic…