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Testing PVLAS axions with resonant photon splitting

Emidio Gabrielli·Massimo Giovannini
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Abstract

The photon splitting gamma -> gamma gamma in a time-independent and inhomogeneous magnetized background is considered when neutral and ultralight spin-0 particles are coupled to two-photons. Depending on the inhomogeneity scale of the external field, resonant photon splitting can occur. If an optical laser crosses a magnetic field of few Tesla with typical inhomogeneity scale of the order of the meter, a potentially observable rate of photon splittings is expected for the PVLAS range of couplings and masses.

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Emidio Gabrielli, Massimo Giovannini. 2007-02-26. Testing PVLAS axions with resonant photon splitting. https://arxiv.org/abs/hep-ph/0702197

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