25-29 June 2018
UTC timezone

Power corrections to the HTL effective Lagrangian of QED

28 Jun 2018, 17:00
Alfa (Barcelona)




Dr Stefano Carignano (ICE)


We present compact expressions for the power corrections to the hard thermal loop (HTL) Lagrangian of QED in d space dimensions. These are corrections of order (L/T)^2, valid for momenta L << T, where T is the temperature. In the limit d → 3 we achieve a consistent regularization of both infrared and ultraviolet divergences, which respects the gauge symmetry of the theory. We also discuss how to generalise our results in the presence of a chemical potential, so as to obtain the power corrections to the hard dense loop (HDL) Lagrangian.

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