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, 96 (11), 110406

Experimental Observation of Optical Rotation Generated in Vacuum by a Magnetic Field

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Experimental Observation of Optical Rotation Generated in Vacuum by a Magnetic Field

E Zavattini et al. Phys Rev Lett.

Abstract

We report the experimental observation of a light polarization rotation in vacuum in the presence of a transverse magnetic field. Assuming that data distribution is Gaussian, the average measured rotation is (3.9 +/- 0.5) x 10(-12) rad/pass, at 5 T with 44 000 passes through a 1 m long magnet, with lambda = 1064 nm. The relevance of this result in terms of the existence of a light, neutral, spin-zero particle is discussed.

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