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  Ghost Condensate in N=1 Supergravity

Koehn, M., Lehners, J.-L., & Ovrut, B. (2014). Ghost Condensate in N=1 Supergravity. In Breaking of Supersymmetry and Ultraviolet Divergences in Extended Supergravity; Springer Proceedings in Physics Volume 153 (pp. 163-178). Springer.

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 Creators:
Koehn, Michael1, Author           
Lehners, Jean-Luc1, Author           
Ovrut, Burt, Author
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1String Cosmology, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_1753351              

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Free keywords: High Energy Physics - Theory, hep-th,Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO
 Abstract: We present the theory of a supersymmetric ghost condensate coupled to N=1 supergravity. This is accomplished using a general formalism for constructing locally supersymmetric higher-derivative chiral superfield actions. The theory admits a ghost condensate vacuum in de Sitter spacetime. Expanded around this vacuum, the scalar sector of the theory is shown to be ghost-free with no spatial gradient instabilities. By direct calculation, the fermion sector is found to consist of a massless chiral fermion and a massless gravitino. By analyzing the supersymmetry transformations, we find that the chiral fermion transforms inhomogeneously, indicating that the ghost condensate vacuum spontaneously breaks local supersymmetry with this field as the Goldstone fermion. Although potentially able to get a mass through the super-Higgs effect, the vanishing superpotential in the ghost condensate theory renders the gravitino massless. Thus local supersymmetry is broken without the super-Higgs effect taking place. This is in agreement with, and gives an explanation for, the direct calculation.

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 Dates: 2012-12-102014
 Publication Status: Issued
 Pages: 41 pages
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 Identifiers: DOI: 10.1007/978-3-319-03774-5_9
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Title: INFN-Laboratori Nazionali di Frascati School
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Start-/End Date: 2013 - 2013

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Title: Breaking of Supersymmetry and Ultraviolet Divergences in Extended Supergravity; Springer Proceedings in Physics Volume 153
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Source Genre: Proceedings
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Publ. Info: Springer
Pages: - Volume / Issue: (6) Sequence Number: - Start / End Page: 163 - 178 Identifier: -