STRUCTURE FORMATION IN THE SYMMETRON MODEL

Scalar fields, strongly coupled to matter, can be present in nature and still be invisible to local experiments if they are subject to a screening mechanism. The symmetron is one such mechanism that relies on restoration of a spontaneously broken symmetry in regions of high density to shield the sca...

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Published inThe Astrophysical journal Vol. 748; no. 1; pp. 61 - 18
Main Authors Davis, Anne-Christine, Li, Baojiu, Mota, David F., Winther, Hans A.
Format Journal Article
LanguageEnglish
Published Bristol IOP 20.03.2012
University of Chicago Press
Subjects
Astronomy
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Broken symmetry
COMPUTERIZED SIMULATION
COSMOLOGICAL MODELS
COSMOLOGY
Dynamical systems
Earth, ocean, space
Exact sciences and technology
Formations
Halos
High density
NONLINEAR PROBLEMS
Retarding
SCALAR FIELDS
Scalars
Shields
SYMMETRY BREAKING
UNIVERSE
Power spectra
High density
Digital simulation
large-scale structure of Universe
N body system
cosmology: miscellaneous
Strong coupling
Large-scale structure
cosmology: theory
Screening
Mass function
Cosmology
Models
Scalar fields
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Summary:Scalar fields, strongly coupled to matter, can be present in nature and still be invisible to local experiments if they are subject to a screening mechanism. The symmetron is one such mechanism that relies on restoration of a spontaneously broken symmetry in regions of high density to shield the scalar fifth force. We have investigated structure formation in the symmetron model by using N-body simulations and find observable signatures in both the linear and nonlinear matter power spectrum and on the halo mass function. The mechanism for suppressing the scalar fifth force in high-density regions is also found to work very well.
Bibliography:ObjectType-Article-1
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ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/748/1/61