  We study the propagation of a linearly polarized laser beam in the external
transverse magnetic field taking into consideration the vacuum polarization by
arbitrary spin particles. Induced ellipticity of the beam are evaluated using
the effective Lagrangian. With the help of the PVLAS experimental data, we
obtain bounds on masses of charged higher spin particles contributed to
ellipticity.

High Energy Physics - Phenomenology;Astrophysics;High Energy Physics - Theory