Branes in the M_D x M_d+ x M_d- Compactification of Type II String on S^1/Z_2 and Their Cosmologicval Applications
| dc.contributor.author | Devin, Michael J. | |
| dc.contributor.author | Ali, Tibra | |
| dc.contributor.author | Cleaver, Gerald B. | |
| dc.contributor.author | Wang, Anzhong. | |
| dc.contributor.author | Wu, Qiang, 1977- | |
| dc.date.accessioned | 2010-07-09T15:21:00Z | |
| dc.date.available | 2010-07-09T15:21:00Z | |
| dc.date.issued | 2010-07-09T15:21:00Z | |
| dc.description.abstract | In this paper, we study the implementation of brane worlds in type II string theory. Starting with the NS/NS sector of type II string, we first compactify the (D + d+ + d−)-dimensional spacetime, and reduce the corresponding action to a D-dimensional effective action, where the topologies of Md+ and Md− are arbitrary. We further compactify one of the (D − 1) spatial dimensions on an S1/Z2 orbifold, and derive the gravitational and matter field equations both in the bulk and on the branes. Then, we investigate two key issues in such a setup: (i) the radion stability and radion mass; and (ii) the localization of gravity, and the corresponding Kaluza-Klein (KK) modes. We show explicitly that the radion is stable and its mass can be in the order of GeV . In addition, the gravity is localized on the visible brane, and its spectrum of the gravitational KK towers is discrete and can have a mass gap of T eV , too. The high order Yukawa corrections to the 4-dimensional Newtonian potential is exponentially suppressed, and can be negligible. Applying such a setup to cosmology, we obtain explicitly the field equations in the bulk and the generalized Friedmann equations on the branes. | en |
| dc.description.keywords | String Cosmology | en |
| dc.description.keywords | Compactification | en |
| dc.description.keywords | Branes | en |
| dc.format.extent | 594883 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.uri | http://hdl.handle.net/2104/7980 | |
| dc.language.iso | en | en |
| dc.title | Branes in the M_D x M_d+ x M_d- Compactification of Type II String on S^1/Z_2 and Their Cosmologicval Applications | en |
| dc.type | Article | en |