Kalb-Ramond axion production in anisotropic string cosmologies - art. no. 123504

We compute the energy spectra for massless Kalb-Ramond axions in four-dimen sional anisotropic string cosmology models. We show that, when integrated o ver directions, the four-dimensional anisotropic model leads to infrared di vergent spectra similar to the one found in the isotropic case.