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Transport coefficients in the early universe

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arxiv hep-ph/9801434 v1 pith:6VA2BNA5 submitted 1998-01-29 hep-ph

classification hep-ph
keywords conductivityearlylsimuniverseapproximationbecauseboltzmanncalculate
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abstract

We calculate numerically the electrical conductivity $\sigma$, heat conductivity $\kappa$ and shear viscosity $\eta$ 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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    hep-ph 2024-12 conditional novelty 6.0 of 10

    A future superconducting radio-frequency cavity experiment could detect relativistic millicharged particles by picking up the tiny currents their plasma induces in a nearby shielded cavity.

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