Renormalization of QED Near Decoupling Temperature

S. Masood
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引用次数: 15

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.
近解耦温度下QED的重整化
我们在解耦温度附近研究了QED的有效参数,并证明了在低于解耦温度下,QED微扰级数是收敛的。如果一个系统从较热的系统冷却到电子质量温度,或者从较冷的系统加热到相同的温度,QED的重整化常数会得到不同的值。在加热系统中,电子自质量的一阶贡献为0.0076,在冷却系统中为0.0115,两者之差等于周围低温值的1/3和高温值的1/2。这种差异是高温下热费米子背景的测量。随着越来越多的费米子在高温下释放,费米子的背景贡献占主导地位,弱相互作用必须被纳入以理解背景效应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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