The Volkov–Akulov–Starobinsky supergravity

We construct a supergravity model whose scalar degrees of freedom arise from a chiral superfield and are solely a scalaron and an axion that is very heavy during the inflationary phase. The model includes a second chiral superfield X, which is subject however to the constraint X2=0 so that it descri...

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Published inPhysics letters. B Vol. 733; pp. 32 - 35
Main Authors Antoniadis, I., Dudas, E., Ferrara, S., Sagnotti, A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 02.06.2014
Subjects
Construction
Elementary particles
Gravitinos
Mathematical analysis
Mathematical models
Scalars
Supergravity
Vectors (mathematics)
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Summary:We construct a supergravity model whose scalar degrees of freedom arise from a chiral superfield and are solely a scalaron and an axion that is very heavy during the inflationary phase. The model includes a second chiral superfield X, which is subject however to the constraint X2=0 so that it describes only a Volkov–Akulov goldstino and an auxiliary field. We also construct the dual higher-derivative model, which rests on a chiral scalar curvature superfield R subject to the constraint R2=0, where the goldstino dual arises from the gauge-invariant gravitino field strength as γmnDmψn. The final bosonic action is an R+R2 theory involving an axial vector Am that only propagates a physical pseudoscalar mode.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2014.04.015