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Structure formation in the symmetron model.

Davis, A.-C. and Li, B. and Mota, D. F. and Winther, H. A. (2012) 'Structure formation in the symmetron model.', Astrophysical journal., 748 (1). p. 61.


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.

Item Type:Article
Keywords:Cosmology: miscellaneous, Cosmology: theory, Large-scale structure of Universe.
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Publisher statement:© 2012. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
Date accepted:No date available
Date deposited:02 May 2014
Date of first online publication:March 2012
Date first made open access:No date available

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