21-26 July 2014
Renold Building
Europe/London timezone
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Large-Field Inflation and Supersymmetry Breaking

Presented by Mr. Lucien HEURTIER on 22 Jul 2014 from 15:10 to 15:30
Type: Quark Flavour Violation: SM and Beyond
Session: Models of SUSY
Track: Quark Flavour Violation: SM and Beyond


Large-field inflation is an interesting and predictive scenario. Its non-trivial embedding in supergravity was intensively studied in the recent literature, whereas its interplay with supersymmetry breaking has been less thoroughly investigated. We consider the minimal viable model of chaotic inflation in supergravity containing a stabilizer field, and add a Polonyi field. Furthermore, we study two possible extensions of the minimal setup. We show that there are various constraints: first of all, it is very hard to couple an O'Raifeartaigh sector with the inflaton sector, the simplest viable option being to couple them only through gravity. Second, even in the simplest model the gravitino mass is bounded from above parametrically by the inflaton mass. Therefore, high-scale supersymmetry breaking is hard to implement in a chaotic inflation setup. As a separate comment we analyze the simplest chaotic inflation construction without a stabilizer field, together with a supersymmetrically stabilized K?hler modulus. Without a modulus, the potential of such a model is unbounded from below. We show that a heavy modulus cannot solve this problem.


Location: Renold
Room: D2

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