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arxiv 1111.6613 v4 pith:3CG63HY7 submitted 2011-11-28 astro-ph.CO hep-phhep-th

Modified Gravity Tomography

Philippe Brax , Anne-Christine Davis , Baojiu Li This is my paper
classification astro-ph.CO hep-phhep-th
keywords gravitymodifiedeffectsfieldlargescalarscaleanalyse
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We consider the effect of a scalar field degree of freedom on the dynamics of gravity from small to large scales. We show that the effects of modified gravity can be completely captured by the time variations of the scalar field mass and its coupling to matter. This leads to a parameterisation of modified gravity where local constraints are easy to analyse and large scale scale structure effects apparent.

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    Solar tachocline production of symmetrons yields a keV-scale flux at Earth whose absorption in xenon detectors provides new complementary bounds on symmetron parameter space.