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Roman Pasechnik

Senior lecturer

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Probing multi-step electroweak phase transition with multi-peaked primordial gravitational waves spectra

Author

  • António P. Morais
  • Roman Pasechnik

Summary, in English

Multi-peaked spectra of the primordial gravitational waves are considered as a phenomenologically relevant source of information about the dynamics of sequential phase transitions in the early Universe. In particular, such signatures trace back to specific patterns of the first-order electroweak phase transition in the early Universe occurring in multiple steps. Such phenomena appear to be rather generic in multi-scalar extensions of the Standard Model. In a particularly simple extension of the Higgs sector, we have identified and studied the emergence of sequential long- and short-lasting transitions as well as their fundamental role in generation of multi-peaked structures in the primordial gravitational-wave spectrum. We discuss the potential detectability of these signatures by the proposed gravitational-wave interferometers.

Department/s

  • Theoretical Particle Physics

Publishing year

2020

Language

English

Publication/Series

Journal of Cosmology and Astroparticle Physics

Volume

2020

Issue

4

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Astronomy, Astrophysics and Cosmology

Status

Published

ISBN/ISSN/Other

  • ISSN: 1475-7516