The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

roman pasechnik

Roman Pasechnik

Senior lecturer

roman pasechnik

Gravitational waves from composite dark sectors

Author

  • Roman Pasechnik
  • Manuel Reichert
  • Francesco Sannino
  • Zhi Wei Wang

Summary, in English

We study under which conditions a first-order phase transition in a composite dark sector can yield an observable stochastic gravitational-wave signal. To this end, we employ the Linear-Sigma model featuring Nf = 3, 4, 5 flavours and perform a Cornwall-Jackiw-Tomboulis computation also accounting for the effects of the Polyakov loop. The model allows us to investigate the chiral phase transition in regimes that can mimic QCD-like theories incorporating in addition composite dynamics associated with the effects of confinement-deconfinement phase transition. A further benefit of this approach is that it allows to study the limit in which the effective interactions are weak. We show that strong first-order phase transitions occur for weak effective couplings of the composite sector leading to gravitational-wave signals potentially detectable at future experimental facilities.

Department/s

  • Particle and nuclear physics

Publishing year

2024-02

Language

English

Publication/Series

Journal of High Energy Physics

Volume

2024

Issue

2

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • Compositeness
  • Models for Dark Matter
  • Phase Transitions in the Early Universe
  • Sigma Models

Status

Published

ISBN/ISSN/Other

  • ISSN: 1029-8479