Light from the Hidden Sector

Details Light from the Hidden Sector Light from the Hidden Sector

2007-06-19

arxiv.org/abs/0706.2836v1

Phys.Rev.D76:115005,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages, 9 figures

Scientific paper

10.1103/PhysRevD.76.115005

Optical precision experiments are a powerful tool to explore hidden sectors of a variety of standard-model extensions with potentially tiny couplings to photons. An important example is given by extensions involving an extra light U(1) gauge degree of freedom, so-called paraphotons, with gauge-kinetic mixing with the normal photon. These models naturally give rise to minicharged particles which can be searched for with optical experiments. In this paper, we study the effects of paraphotons in such experiments. We describe in detail the role of a magnetic field for photon-paraphoton oscillations in models with low-mass minicharged particles. In particular, we find that the upcoming light-shining-through-walls experiments are sensitive to paraphotons and can distinguish them from axion-like particles.

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