%0 Report
%A Buchmuller, Wilfried
%A Dudas, Emilian
%A Heurtier, Lucien
%A Westphal, Alexander
%A Wieck, Clemens
%A Winkler, Martin Wolfgang
%T Challenges for Large-Field Inflation and Moduli Stabilization
%N DESY-15-014
%M PUBDB-2015-01152
%M DESY-15-014
%M CPHT-RR002.0115
%M arXiv:1501.0581
%B Red Report
%P 44
%D 2015
%Z OA
%X We analyze the interplay between Káhler moduli stabilization and chaotic inflation in supergravity. While heavy moduli decouple from inflation in the supersymmetric limit, supersymmetry breaking generically introduces non-decoupling effects. These lead to inflation driven by a soft mass term, m<sub>φ</sub><sup>2</sup>  ∼ m m<sub>3/2</sub>, where m is a supersymmetric mass parameter. This scenario needs no stabilizer field, but the stability of moduli during inflation imposes a large supersymmetry breaking scale, m<sub>3/2</sub>  >> H, and a careful choice of initial conditions. This is illustrated in three prominent examples of moduli stabilization: KKLT stabilization, Káhler Uplifting, and the Large Volume Scenario. Remarkably, all models have a universal effective inflaton potential which is flattened compared to quadratic inflation. Hence, they share universal predictions for the CMB observables, in particular a lower bound on the tensor-to-scalar ratio, r  >~0.05.
%F PUB:(DE-HGF)29 ; PUB:(DE-HGF)15
%9 ReportInternal Report
%U https://bib-pubdb1.desy.de/record/207168