Testing Chameleon Theories with Light Propagating through a Magnetic Field

Details Testing Chameleon Theories with Light Propagating through a Magnetic Field Testing Chameleon Theories with Light Propagating through a Magnetic Field

2007-07-18

arxiv.org/abs/0707.2801v2

Phys.Rev.D76:085010,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 6 figures. New paragraph and two extra plots with the predictions for Chameleon models within the BRFT experimental

Scientific paper

10.1103/PhysRevD.76.085010

It was recently argued that the observed PVLAS anomaly can be explained by chameleon field theories in which large deviations from Newton's law can be avoided. Here we present the predictions for the dichroism and the birefringence induced in the vacuum by a magnetic field in these models. We show that chameleon particles behave very differently from standard axion-like particles (ALPs). We find that, unlike ALPs, the chameleon particles are confined within the experimental set-up. As a consequence, the birefringence is always bigger than the dichroism in PVLAS-type experiments.

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