Dynamics of Kaluza-Klein Towers in the Early Universe

Keith R. Dienes, Jeff Kost, Brooks Thomas

Research output: Contribution to journalConference articlepeer-review


In this talk, we report on the results of a study [1, 2] of the early-universe cosmology of a Kaluza-Klein (KK) tower of scalar fields in the presence of a mass-generating phase transition, focusing on the time-development of the total tower energy density (or relic abundance) as well as its distribution across the different KK modes. We find that both of these features are extremely sensitive to the details of the phase transition and can behave in a variety of ways significant for late-time cosmology. In particular, we find that the interplay between the temporal properties of the phase transition and the mixing it generates are responsible for both enhancements and suppressions in the late-time abundances of KK modes, sometimes by many orders of magnitude.y.

Original languageEnglish (US)
Article number140
JournalProceedings of Science
StatePublished - 2019
Event39th International Conference on High Energy Physics, ICHEP 2018 - Seoul, Korea, Republic of
Duration: Jul 4 2018Jul 11 2018

ASJC Scopus subject areas

  • General


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