Effective degrees of freedom during the radiation era

Abstract

We update the curves of the effective degrees of freedom for the energy density $g_{\ast }(T)$ and for the entropy density $g_{\ast S}(T)$ during the era of radiation domination in the Universe. We find that a plain count of effective degrees of freedom sets an upper limit to the temperature of the quark-hadron transition at $T_c<235$ MeV for the energy density and $T_c<245$ MeV for the entropy density.

3 pages, 2 figures

References in corpus (1)

• Thermal phase transitions in cosmology

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