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DOI 10.1103/PhysRevD.66.043509
Title Cosmic strings in a braneworld theory with metastable gravitons
Creator/Author Lue, Arthur [Department of Physics, New York University, New York, New York 10003 (United States)]
Publication Date2002 Aug 15
OSTI IdentifierOSTI ID: 20495368
Other Number(s)Journal ID: ISSN 0556-2821; PRVDAQ; TRN: US03B1184067582
Resource TypeJournal Article
Resource RelationJournal: Physical Review. D, Particles Fields; Journal Volume: 66; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevD.66.043509; (c) 2002 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); PBD: 15 Aug 2002
Subject72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGY; EINSTEIN FIELD EQUATIONS; GRAND UNIFIED THEORY; GRAVITATION; GRAVITONS; MATHEMATICAL SOLUTIONS; PERTURBATION THEORY; POTENTIALS; STRING MODELS
Description/Abstract If the graviton possesses an arbitrarily small (but nonvanishing) mass, perturbation theory implies that cosmic strings have a nonzero Newtonian potential. Nevertheless in Einstein gravity, where the graviton is strictly massless, the Newtonian potential of a cosmic string vanishes. This discrepancy is an example of the van Dam-Veltman-Zakharov (VDVZ) discontinuity. We present a solution for the metric around a cosmic string in a braneworld theory with a graviton metastable on the brane. This theory possesses those features that yield a VDVZ discontinuity in massive gravity, but nevertheless is generally covariant and classically self-consistent. Although the cosmic string in this theory supports a nontrivial Newtonian potential far from the source, one can recover the Einstein solution in a region near the cosmic string. That latter region grows as the graviton's effective linewidth vanishes (analogous to a vanishing graviton mass), suggesting the lack of a VDVZ discontinuity in this theory. Moreover, the presence of scale dependent structure in the metric may have consequences for the search for cosmic strings through gravitational lensing techniques.
Country of PublicationUnited States
LanguageEnglish
FormatSize: page(s) 043509-043509.8
System Entry Date2004 Jul 13

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