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Second Order Corrections to QED Coupling at Low Temperature
We calculate the second order corrections to vacuum polarization tensor of
photons at low temperatures, i.e; T K (). The thermal
contributions to the QED coupling constant are evaluated at temperatures below
the electron mass that is . Renormalization of QED at these
temperatures has explicitly been checked. The electromagnetic properties of
such a thermal medium are modified. Parameters like electric permittivity and
magnetic permeability of such a medium are no more constant and become
functions of temperature.Comment: 8 latex pages and 1 figure (to appear in IJMP
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