Power Counting Rules for Next-to-Leading Order Hard Thermal Loop Theory
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Date
2012-04-20
Authors
Mirza, Alex
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Abstract
The goal of this thesis is to determine power counting rules at next-to-leading order (NLO) in the hard
thermal loop (HTL) resummation. The original paper by Braaten and Pisarski discusses NLO HTL resummation
and argues that there are potentially three types of contributions. We start by studying these terms
in the specific case of the boson and fermion self energies in QED and QCD, as these quantities have been
calculated in previous literature. For the real and imaginary parts of the fermion and gluon self energies,
one needs to calculate only one type of term, as the other two are found to be subleading. However, for the
real and imaginary parts of the photon self energy, all types of terms need to be calculated.
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Keywords
physics, theory, high energy