The Volkov-Akulov-Starobinsky supergravity

DOI10.1016/J.PHYSLETB.2014.04.015zbMATH Open1370.83099arXiv1403.3269OpenAlexW1853646582WikidataQ56972439 ScholiaQ56972439MaRDI QIDQ2402013

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Publication date: 6 September 2017

Published in: (Search for Journal in Brave)

Abstract: 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 $X^2=0$ 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 $calR$ subject to the constraint ${calR}^2=0$, where the goldstino dual arises from the gauge - invariant gravitino field strength as $gamm{a}^{mn}{calD}_{m}ps{i}_n$. The final bosonic action is an $R+R^2$ theory involving an axial vector $A_m$ that only propagates a physical pseudoscalar mode.

Full work available at URL: https://arxiv.org/abs/1403.3269

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