Phenomenological aspects of Hořava-Lifshitz cosmology

Shinji Mukohyama, Kazunori Nakayama, Fuminobu Takahashi, Shuichiro Yokoyama

Research output: Contribution to journalArticlepeer-review

112 Citations (Scopus)


We show that, assuming the dispersion relation proposed recently by Hořava in the context of quantum gravity, radiation energy density exhibits a peculiar dependence on the scale factor; the radiation energy density decreases proportional to a-6. This simple scaling can have an impact on cosmology. As an example, we show that the resultant baryon asymmetry as well as the stochastic gravity waves can be enhanced. We also discuss current observational constraint on the dispersion relation.

Original languageEnglish
Pages (from-to)6-9
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1
Publication statusPublished - 2009 Aug 10
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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