Reconciling the CAST and PVLAS Results

Details Reconciling the CAST and PVLAS Results Reconciling the CAST and PVLAS Results

2006-10-05

arxiv.org/abs/hep-ph/0610068v2

Phys.Rev.Lett.98:050402,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures; references updated

Scientific paper

10.1103/PhysRevLett.98.050402

The PVLAS experiment has recently claimed evidence for an axion-like particle in the milli-electron-Volt mass range with a coupling to two photons that appears to be in contradiction with the negative results of the CAST experiment searching for solar axions. The simple axion interpretation of these two experimental results is therefore untenable and it has posed a challenge for theory. We propose a possible way to reconcile these two results by postulating the existence of an ultralight pseudo-scalar particle interacting with two photons and a scalar boson and the existence of a low scale phase transition in the theory.

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