Constraining the early Hubble rate using Cosmic Antiprotons

Details Constraining the early Hubble rate using Cosmic Antiprotons Constraining the early Hubble rate using Cosmic Antiprotons

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007nuphs.173...56s&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 173, p. 56-59.

Physics

Nuclear Physics

Dark Matter, Dark Energy, Cosmology, Gravity In More Than Four Dimensions, Kaluza-Klein Theory, Unified Field Theories, Alternative Theories Of Gravity, Cosmic Rays, Cosmic Rays, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

Many interesting cosmological models predict an enhancement of the Hubble expansion rate in the early Universe. Among these are some braneworld models, models with a kination phase and scalar-tensor models. In this paper we show that the pre Big Bang Nucleosynthesis (pre-BBN) enhancement can be strongly constrained by the combined use of the bounds on the Dark Matter relic density and antiproton production. For a Dark Matter particle of 100 GeV the maximal enhancement of the Hubble rate ranges from a few up to a factor of 30.

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