Warped Reheating in Multi-Throat Brane Inflation
| Autor: | Bret Underwood, Diego Chialva, Gary Shiu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
High Energy Physics - Theory
Nuclear and High Energy Physics Particle physics FOS: Physical sciences String theory Astrophysics 01 natural sciences Standard Model High Energy Physics::Theory General Relativity and Quantum Cosmology High Energy Physics - Phenomenology (hep-ph) Throat 0103 physical sciences medicine Image warping 010306 general physics Coupling Inflation (cosmology) Physics 010308 nuclear & particles physics Astrophysics (astro-ph) Graviton High Energy Physics - Phenomenology medicine.anatomical_structure High Energy Physics - Theory (hep-th) Brane |
| Popis: | We investigate in some quantitative details the viability of reheating in multi-throat brane inflationary scenarios by estimating and comparing the time scales for the various processes involved. We also calculate within perturbative string theory the decay rate of excited closed strings into KK modes and compare with that of their decay into gravitons; we find that in the inflationary throat the former is preferred. We also find that over a small but reasonable range of parameters of the background geometry, these KK modes will preferably tunnel to another throat (possibly containing the Standard Model) instead of decaying to gravitons due largely to their suppressed coupling to the bulk gravitons. Once tunneled, the same suppressed coupling to the gravitons again allows them to reheat the Standard Model efficiently. We also consider the effects of adding more throats to the system and find that for extra throats with small warping, reheating still seems viable. 29 pages, 4 figures, discussions on closed string decay expanded, references added |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|