How does the energy density of Kaluza-Klein gravitons in an AdS braneworld scale?

by Dr Marcus RUSER (U. of Geneva)

Wednesday 4 Jun 2008, 11:00 → 12:00 Europe/Zurich

1/1-025 (CERN)

After a brief overview of graviton production in AdS braneworlds, I will focus on three different papers discussing this topic. All three (seem to) give a different answer for the scaling of the energy density of Kaluza-Klein gravitons with the expansion of the Universe. I will compare (and defend) our own result that this density scales like 1/a^6 against the two others and show that it is indeed a necessary consequence of the localization of four-dimensional gravity in Randall-Sundrum models.

References:

• Gorbunov D. S, Rubakov V. A., and Sibiryakov S.x M, JHEP 10, 015 (2001), arXiv:hep-th/0108017
• Minamitsuji M, Sasaki M, and Langlois D, Phys. Rev. D 71, 084019 (2005), arXiv:gr-qc/0501086
• Ruser, M and Durrer R, Phys. Rev. D 76, 104014 (2007), arXiv:0704.0790