12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Stringy effects during inflation and reheating
View graph of relations

« Back

Stringy effects during inflation and reheating

Research output: Contribution to journalJournal article

Published

Article number026003
Journal publication date23/01/2006
JournalPhysical Review D
Journal number2
Volume73
Number of pages29
Original languageEnglish

Abstract

We consider inflationary cosmology in the context of string compactifications with multiple throats. In scenarios where the warping differs significantly between throats, string and Kaluza-Klein physics can generate potentially observable corrections to the cosmology of inflation and reheating. First we demonstrate that a very low string scale in the ground state compactification is incompatible with a high Hubble scale during inflation, and we propose that the compactification geometry is altered during inflation. In this configuration, the lowest scale is just above the Hubble scale, which is compatible with effective field theory but still leads to potentially observable CMB corrections. Also in the appropriate region of parameter space, we find that reheating leads to a phase of long open strings in the Standard Model sector (before the usual radiation-dominated phase). We sketch the cosmology of the long string phase and we discuss possible observational consequences.

Bibliographic note

© 2006 The American Physical Society 33pp, RevTeX4, v2. minor changes, added refs