Cosmological phase transitions in warped space: gravitational waves and collider signatures

Megías, Eugenio; Nardini, Germano; Quirós, Mariano (2018). Cosmological phase transitions in warped space: gravitational waves and collider signatures. Journal of High Energy Physics, 2018(9) Springer 10.1007/JHEP09(2018)095

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We study the electroweak phase transition within a 5D warped model including a scalar potential with an exponential behavior, and strong back-reaction over the metric, in the infrared. By means of a novel treatment of the superpotential formalism, we explore parameter regions that were previously inaccessible. We find that for large enough values of the t’Hooft parameter (e.g. N ≃ 25) the holographic phase transition occurs, and it can force the Higgs to undergo a first order electroweak phase transition, suitable for electroweak baryogenesis. The model exhibits gravitational waves and colliders signatures. It typically predicts a stochastic gravitational wave background observable both at the Laser Interferometer Space Antenna and at the Einstein Telescope. Moreover the radion tends to be heavy enough such that it evades current constraints, but may show up in future LHC runs.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Nardini, Germano

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

02 Oct 2018 15:56

Last Modified:

24 Oct 2019 00:19

Publisher DOI:

10.1007/JHEP09(2018)095

ArXiv ID:

1806.04877

BORIS DOI:

10.7892/boris.120264

URI:

https://boris.unibe.ch/id/eprint/120264

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