Kalb-Ramond axion production in anisotropic string cosmologies
Ruth Durrer, Mairi Sakellariadou
Abstract
We compute the energy spectra for massless Kalb-Ramond axions in four-dimensional anisotropic string cosmological models. We show that, when integrated over directions, the four-dimensional anisotropic model leads to infra-red divergent spectra similar to the one found in the isotropic case.
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