Constraining ALPs with linear and circular polarisation measurements of quasar light
arXiv:1309.6114
Abstract
We discuss the constraints derived on the mixing of photons with light pseudoscalars using the distributions of good-quality linear and circular polarisation measurements of light from the least polarised classes of quasars. We also provide the dependence of our limit on the average electron density in the local supercluster for nearly massless particles.
4 pages, 1 figure; contributed to the 9th Patras Workshop on Axions, WIMPs and WISPs, Mainz, June 24-28, 2013