Effective degrees of freedom during the radiation era

Details Effective degrees of freedom during the radiation era Effective degrees of freedom during the radiation era

2003-04-15

arxiv.org/abs/astro-ph/0304281v2

Phys.Rev. D68 (2003) 027702

Astronomy and Astrophysics

Astrophysics

3 pages, 2 figures

Scientific paper

10.1103/PhysRevD.68.027702

We update the curves of the effective degrees of freedom for the energy density $g_*(T)$ and for the entropy density $g_{*S}(T)$ 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.

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