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arXiv · hep-ph/9801434

Transport coefficients in the early universe

Jarkko Ahonen
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Abstract

We calculate numerically the electrical conductivity $σ$, heat conductivity $κ$ and shear viscosity $η$ of the hot plasma present in the early universe for the temperature interval $1\MeV\lsim T\lsim 10\GeV$. We use the Boltzmann collision equation to compute all the scattering matrix elements and regulate them by the thermal masses of the $t$- and $u$-channel particles. No leading order approximation is needed because of the numerical integration routines used.

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Jarkko Ahonen. 1998-01-29. Transport coefficients in the early universe. https://doi.org/10.1103/physrevd.59.023004

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