TL;DR
The PVLAS experiment observed unexpectedly large polarization rotations in laser light under a magnetic field, suggesting possible evidence for a light spin-zero boson with specific mass and coupling parameters.
Contribution
First to report polarization rotation measurements in a magnetic field that may indicate new light bosons beyond the Standard Model.
Findings
Observed rotation effects between 10^-7 and 4×10^-7 rad.
Results consistent with a light boson of mass around 1 meV.
Estimated coupling strength of the boson to photons is about 10^6 GeV.
Abstract
The PVLAS experiment has built an apparatus to measure rotations and ellipticities induced by a transverse magnetic field onto linearly polarized laser light.Available results can be interpreted as observation of an unexpectedly large rotation effect between 10-7 and 4 10-7rad. If this rotation is due to the existence of a light spin zero boson of mass m and coupling to two photons 1/M, the ball-park values of the boson mass parameters are m=1meV and M=10+6GeV.
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Taxonomy
TopicsSpectroscopy and Laser Applications · Atomic and Molecular Physics · X-ray Spectroscopy and Fluorescence Analysis