Home > Research > Publications & Outputs > Waterfall stiff period can generate observable ...

Research

Electronic data

  • JCAP16

    Final published version, 3.16 MB, PDF document

    Available under license: CC BY: Creative Commons Attribution 4.0 International License

Links

  • http://"363632852 "

    Final published version

    Licence: CC BY: Creative Commons Attribution 4.0 International License

Text available via DOI:

Keywords

View graph of relations

Waterfall stiff period can generate observable primordial gravitational waves

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Published

Standard

Waterfall stiff period can generate observable primordial gravitational waves. / Dimopoulos, Konstantinos.
In: Journal of Cosmology and Astroparticle Physics, Vol. 2022, No. 10, 027, 10.10.2022.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Dimopoulos, K 2022, 'Waterfall stiff period can generate observable primordial gravitational waves', Journal of Cosmology and Astroparticle Physics, vol. 2022, no. 10, 027. https://doi.org/10.1088/1475-7516/2022/10/027

APA

Dimopoulos, K. (2022). Waterfall stiff period can generate observable primordial gravitational waves. Journal of Cosmology and Astroparticle Physics, 2022(10), Article 027. https://doi.org/10.1088/1475-7516/2022/10/027

Vancouver

Dimopoulos K. Waterfall stiff period can generate observable primordial gravitational waves. Journal of Cosmology and Astroparticle Physics. 2022 Oct 10;2022(10):027. doi: 10.1088/1475-7516/2022/10/027

Author

Dimopoulos, Konstantinos. / Waterfall stiff period can generate observable primordial gravitational waves. In: Journal of Cosmology and Astroparticle Physics. 2022 ; Vol. 2022, No. 10.

Bibtex

@article{5ebf0d895f7547bbad6b7a04579003a4,
title = "Waterfall stiff period can generate observable primordial gravitational waves",
abstract = "Abstract: A toy-model is studied, which considers two flat directions meeting at an enhanced symmetry point such that they realise the usual hybrid inflation mechanism. The kinetic term of the waterfall field features a pole at its Planckian vacuum expectation value (VEV), as with α-attractors. Consequently, after the phase transition which terminates hybrid inflation, the waterfall field never rolls to its VEV. Instead, it drives a stiff period, where the barotropic parameter of the Universe w ≈ 1/2 results in a peak in the spectrum of primordial gravitational waves, which will be observable by the forthcoming LISA mission as well as by Advanced LIGO.",
keywords = "paper, inflation, physics of the early universe, primordial gravitational waves (theory)",
author = "Konstantinos Dimopoulos",
year = "2022",
month = oct,
day = "10",
doi = "10.1088/1475-7516/2022/10/027",
language = "English",
volume = "2022",
journal = "Journal of Cosmology and Astroparticle Physics",
issn = "1475-7516",
publisher = "IOP Publishing",
number = "10",

}

RIS

TY - JOUR

T1 - Waterfall stiff period can generate observable primordial gravitational waves

AU - Dimopoulos, Konstantinos

PY - 2022/10/10

Y1 - 2022/10/10

N2 - Abstract: A toy-model is studied, which considers two flat directions meeting at an enhanced symmetry point such that they realise the usual hybrid inflation mechanism. The kinetic term of the waterfall field features a pole at its Planckian vacuum expectation value (VEV), as with α-attractors. Consequently, after the phase transition which terminates hybrid inflation, the waterfall field never rolls to its VEV. Instead, it drives a stiff period, where the barotropic parameter of the Universe w ≈ 1/2 results in a peak in the spectrum of primordial gravitational waves, which will be observable by the forthcoming LISA mission as well as by Advanced LIGO.

AB - Abstract: A toy-model is studied, which considers two flat directions meeting at an enhanced symmetry point such that they realise the usual hybrid inflation mechanism. The kinetic term of the waterfall field features a pole at its Planckian vacuum expectation value (VEV), as with α-attractors. Consequently, after the phase transition which terminates hybrid inflation, the waterfall field never rolls to its VEV. Instead, it drives a stiff period, where the barotropic parameter of the Universe w ≈ 1/2 results in a peak in the spectrum of primordial gravitational waves, which will be observable by the forthcoming LISA mission as well as by Advanced LIGO.

KW - paper

KW - inflation

KW - physics of the early universe

KW - primordial gravitational waves (theory)

U2 - 10.1088/1475-7516/2022/10/027

DO - 10.1088/1475-7516/2022/10/027

M3 - Journal article

VL - 2022

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

SN - 1475-7516

IS - 10

M1 - 027

ER -