1 research outputs found
Axions, their Relatives and Prospects for the Future
The observation of a non-vanishing rotation of linear polarized laser light
after passage through a strong magnetic field by the PVLAS collaboration has
renewed the interest in light particles coupled to photons. Axions are a
species of such particles that is theoretically well motivated. However, the
relation between coupling and mass predicted by standard axion models conflicts
with the PVLAS observation. Moreover, light particles with a coupling to
photons of the strength required to explain PVLAS face trouble from
astrophysical bounds. We discuss models that can avoid these bounds. Finally,
we present some ideas to test these possible explanations of PVLAS
experimentally.Comment: 11 pages, 4 figures. Contributed to the ``Third Symposium on Large
TPCs for Low Energy Rare Event Detection'' in Paris, December 200