Table of Contents
Physics Research International
Volume 2014 (2014), Article ID 489163, 9 pages
http://dx.doi.org/10.1155/2014/489163
Research Article

Renormalization of QED Near Decoupling Temperature

Physics Department, University of Houston Clear Lake, Houston, TX 77058, USA

Received 26 December 2013; Revised 28 April 2014; Accepted 7 May 2014; Published 24 June 2014

Academic Editor: Ali Hussain Reshak

Copyright © 2014 Samina S. Masood. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

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 , the first order contribution to the electron self-mass, 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 . 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.