We need lab experiments to look for axion-like particles

Abstract

The PVLAS signal has renewed the interest in light bosons coupled to the electromagnetic field. However, astrophysical bounds coming from the lifetime of the sun and the CAST experiment are seemingly in conflict with this result. We discuss effective models that allow to suppress production of axion-like particles in the sun and thereby relax the bounds by some orders of magnitude. This stresses the importance of laboratory searches.

Comments: 4 pages, 1 figure Contribution to the proceedings of the "Rencontres des Moriond:Contents and structures of the universe"