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The Electrical Conductivity in the Early Universe | | Gordon Baym
; H. Heiselberg
; | | Date: |
22 Apr 1997 | | Journal: | Phys.Rev. D56 (1997) 5254-5259 | | Subject: | astro-ph cond-mat hep-ph | | Affiliation: | Urbana, Illinois), H. Heiselberg (NORDITA | | Abstract: | We calculate the electrical conductivity in the early universe at temperatures below as well as above the electroweak vacuum scale, $T_csimeq 100$GeV. Debye and dynamical screening of electric and magnetic interactions leads to a finite conductivity, $sigma_{el}sim T/alphaln(1/alpha)$, at temperatures well below $T_c$. At temperatures above, $W^pm$ charge-exchange processes -- analogous to color exchange through gluons in QCD -- effectively stop left-handed charged leptons. However, right-handed leptons can carry current, resulting in $sigma_{el}/T$ being only a factor $sim cos^4 heta_W$ smaller than at temperatures below $T_c$. | | Source: | arXiv, astro-ph/9704214 | | Services: | Forum | Review | PDF | Favorites | |
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