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Primordial black hole archaeology with gravitational waves from cosmic strings (2023)
Journal Article
Ghoshal, A., Gouttenoire, Y., Heurtier, L., & Simakachorn, P. (2023). Primordial black hole archaeology with gravitational waves from cosmic strings. Journal of High Energy Physics, 2023(8), Article 196. https://doi.org/10.1007/jhep08%282023%29196

Light primordial black holes (PBHs) with masses smaller than 109 g (10−24M⊙) evaporate before the onset of Big-Bang nucleosynthesis, rendering their detection rather challenging. If efficiently produced, they may have dominated the universe energy de... Read More about Primordial black hole archaeology with gravitational waves from cosmic strings.

Evaporation of primordial black holes in the early Universe: Mass and spin distributions (2023)
Journal Article
Cheek, A., Heurtier, L., Perez-Gonzalez, Y. F., & Turner, J. (2023). Evaporation of primordial black holes in the early Universe: Mass and spin distributions. Physical Review D, 108(1), Article 015005. https://doi.org/10.1103/physrevd.108.015005

Many cosmological phenomena lead to the production of primordial black holes in the early Universe. These phenomena often create a population of black holes with extended mass and spin distributions. As these black holes evaporate via Hawking radiati... Read More about Evaporation of primordial black holes in the early Universe: Mass and spin distributions.

Redshift effects in particle production from Kerr primordial black holes (2022)
Journal Article
Cheek, A., Heurtier, L., Perez-Gonzalez, Y. F., & Turner, J. (2022). Redshift effects in particle production from Kerr primordial black holes. Physical Review D, 106(10), https://doi.org/10.1103/physrevd.106.103012

When rotating primordial black holes evaporate via Hawking radiation, their rotational energy and mass are dissipated with different dynamics. We investigate the effect of these dynamics on the production of dark radiation—in the form of hot graviton... Read More about Redshift effects in particle production from Kerr primordial black holes.

Signatures of non-thermal dark matter with kination and early matter domination. Gravitational waves versus laboratory searches (2022)
Journal Article
Ghoshal, A., Heurtier, L., & Paul, A. (2022). Signatures of non-thermal dark matter with kination and early matter domination. Gravitational waves versus laboratory searches. Journal of High Energy Physics, 2022(12), Article 105. https://doi.org/10.1007/jhep12%282022%29105

The non-thermal production of dark matter (DM) usually requires very tiny couplings of the dark sector with the visible sector and therefore is notoriously challenging to hunt in laboratory experiments. Here we propose a novel pathway to test such a... Read More about Signatures of non-thermal dark matter with kination and early matter domination. Gravitational waves versus laboratory searches.

Primordial black hole evaporation and dark matter production. II. Interplay with the freeze-in or freeze-out mechanism (2022)
Journal Article
Cheek, A., Heurtier, L., Perez-Gonzalez, Y. F., & Turner, J. (2022). Primordial black hole evaporation and dark matter production. II. Interplay with the freeze-in or freeze-out mechanism. Physical Review D, 105(1), https://doi.org/10.1103/physrevd.105.015023

We study how the evaporation of primordial black holes (PBHs) can affect the production of dark matter (DM) particles through thermal processes. We consider fermionic DM interacting with Standard Model particles via a spin-1 mediator in the context o... Read More about Primordial black hole evaporation and dark matter production. II. Interplay with the freeze-in or freeze-out mechanism.

Primordial black hole evaporation and dark matter production. I. Solely Hawking radiation (2022)
Journal Article
Cheek, A., Heurtier, L., Perez-Gonzalez, Y. F., & Turner, J. (2022). Primordial black hole evaporation and dark matter production. I. Solely Hawking radiation. Physical Review D, 105(1), https://doi.org/10.1103/physrevd.105.015022

Hawking evaporation of black holes in the early Universe is expected to copiously produce all kinds of particles, regardless of their charges under the Standard Model gauge group. For this reason, any fundamental particle, known or otherwise, could b... Read More about Primordial black hole evaporation and dark matter production. I. Solely Hawking radiation.

Stasis in an expanding universe: A recipe for stable mixed-component cosmological eras (2022)
Journal Article
Dienes, K. R., Heurtier, L., Huang, F., Kim, D., Tait, T. M., & Thomas, B. (2022). Stasis in an expanding universe: A recipe for stable mixed-component cosmological eras. Physical Review D, 105(2), Article 023530. https://doi.org/10.1103/physrevd.105.023530

One signature of an expanding universe is the time variation of the cosmological abundances of its different components. For example, a radiation-dominated universe inevitably gives way to a matterdominated universe, and critical moments such as matt... Read More about Stasis in an expanding universe: A recipe for stable mixed-component cosmological eras.

Resurrecting low-mass axion dark matter via a dynamical QCD scale (2021)
Journal Article
Heurtier, L., Huang, F., & Tait, T. M. (2021). Resurrecting low-mass axion dark matter via a dynamical QCD scale. Journal of High Energy Physics, 2021(12), Article 216. https://doi.org/10.1007/jhep12%282021%29216

In the framework where the strong coupling is dynamical, the QCD sector may confine at a much higher temperature than it would in the Standard Model, and the temperature-dependent mass of the QCD axion evolves in a non-trivial way. We find that, depe... Read More about Resurrecting low-mass axion dark matter via a dynamical QCD scale.