Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Renormalization of QED near Decoupling Temperature   We study the effective parameters of QED near decoupling temperatures and
show that the QED perturbative series is convergent, at temperatures below the
decoupling temperature. The renormalization constant of QED acquires different
values if a system cools down from a hotter system to the electron mass
temperature or heats up from a cooler system to the same temperature. At T = m,
the first order contribution to the electron selfmass, {\delta}m/m is 0.0076
for a heating system and 0.0115 for a cooling system and the difference between
two values is equal to 1/3 of the low temperature value and 1/2 of the high
temperature value around T~m. This difference is a measure of hot fermion
background at high temperatures. With the increase in release of more fermions
at hotter temperatures, the fermion background contribution dominates and weak
interactions have to be incorporated to understand the background effects.

36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
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The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph