Colóquio: Laboratory and Astrophysical Constraints on an Axion (Prof. Dr. Vladimir M. Mostepanenko - Russian Academy of Sciences/Great St.Petersburg Polytechnic University)

Axion is light pseudoscalar elementary particle. It explains why there are no strong CP violation and large electric dipole moment of a neutron in QCD. Axions are also considered as the most probable constituents of dark matter in astrophysics and cosmology. In spite of many attempts made until now, axions are not yet discovered experimentally. We discuss the most important axion searches in both laboratory and astrophysical experiments. Special attention is paid to constraints on the parameters of axions obtained from experimentson measuring the Casimir interaction.