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  Ghost Condensate in N=1 Supergravity

Koehn, M., Lehners, J.-L., & Ovrut, B. (2013). Ghost Condensate in N=1 Supergravity. Physical Review D, 87(6): 065022. doi:10.1103/PhysRevD.87.065022.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-74B7-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1924-3
Genre: Journal Article

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 Creators:
Koehn, Michael1, Author              
Lehners, Jean-Luc1, Author              
Ovrut, Burt, Author
Affiliations:
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: 2012-12-102013
 Publication Status: Published in print
 Pages: 41 pages
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1212.2185
DOI: 10.1103/PhysRevD.87.065022
 Degree: -

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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : Published for the American Physical Society by the American Institute of Physics
Pages: - Volume / Issue: 87 (6) Sequence Number: 065022 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258