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 > Gauge-invariant inflaton in the minimal supersy...
View graph of relations

« Back

Gauge-invariant inflaton in the minimal supersymmetric standard model

Research output: Contribution to journalJournal article

Published

Article number191304
Journal publication date9/11/2006
JournalPhysical Review Letters
Journal number19
Volume97
Number of pages4
Original languageEnglish

Abstract

We argue that all the necessary ingredients for successful inflation are present in the flat directions of the Minimally Supersymmetric Standard Model. We show that out of many gauge invariant combinations of squarks, sleptons and Higgses, there are two directions, ${\bf LLe}$, and ${\bf udd}$, which are promising candidates for the inflaton. The model predicts more than $10^3$ e-foldings with an inflationary scale of $H_{\rm inf}\sim {\cal O}(1-10)$ GeV, provides a tilted spectrum with an amplitude of $\delta_H\sim 10^{-5}$ and a negligible tensor perturbation. The temperature of the thermalized plasma could be as low as $T_{rh}\sim {\cal O}(1-10)$~TeV. Parts of the inflaton potential can be determined independently of cosmology by future particle physics experiments.

Bibliographic note

© 2006 The American Physical Society 4 revtex pages, some references added, stabilization of moduli and supergravity effects are discussed