Speaker
Tomi Koivisto
(Nordita)
Description
The talk is about the possibility of matter residing on a brane moving in extra dimensions. Such matter would be disformally coupled to gravity. Due to a screening mechanism, the coupling could be viable even in the visible sector. The Dirac-Born-Infeld set-up in type II string theory is used to illustrate how the coupling functions can be explicitly deduced from the higher dimensional geometry, and general implications of disformal matter couplings are reviewed. A concrete cosmological model with dark matter residing on the moving brane is presented to demonstrate how some fine-tuning problems of the dark sector might be alleviated in this framework.
Author
Tomi Koivisto
(Nordita)
Co-authors
Ms
Danielle Wills
(Durham University)
David F. Mota
(University of Oslo)
Dr
Ivonne Zavala
(Durham University)
Dr
Miguel Zumalacarregui
(Heidelberg University)
