Laser experiments explore the hidden sector

Details Laser experiments explore the hidden sector Laser experiments explore the hidden sector

2007-11-30

arxiv.org/abs/0711.4991v1

Phys.Rev.D77:095001,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 4 figures

Scientific paper

10.1103/PhysRevD.77.095001

Recently, the laser experiments BMV and GammeV, searching for light shining through walls, have published data and calculated new limits on the allowed masses and couplings for axion-like particles. In this note we point out that these experiments can serve to constrain a much wider variety of hidden-sector particles such as, e.g., minicharged particles and hidden-sector photons. The new experiments improve the existing bounds from the older BFRT experiment by a factor of two. Moreover, we use the new PVLAS constraints on a possible rotation and ellipticity of light after it has passed through a strong magnetic field to constrain pure minicharged particle models. For masses <~0.05 eV, the charge is now restricted to be less than (3-4)x10^(-7) times the electron electric charge. This is the best laboratory bound and comparable to bounds inferred from the energy spectrum of the cosmic microwave background.

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