Three-forms and Fayet-Iliopoulos terms in Supergravity: Scanning Planck mass and BPS domain walls

Abstract

We embed a new three-form vector multiplet in $\mathcal{N}=1$ supergravity and we show that it can be used to generate dynamically the Hilbert--Einstein term. We then recast the theory into the standard Freedman model and we argue that a pure Fayet--Iliopoulos term is in tension with the weak gravity conjecture. Finally, we couple the three-form to a super-membrane and study BPS domain walls within matter-coupled supergravity. In these models, the Planck mass takes different values on the domain wall sides.

arXiv comment44 pages, 3 plots, published version

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