Infrared multiphoton resummation in quantum electrodynamics

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:369

Article; Proceedings Paper

Mati, P.¹ 

[1] ELI Hu NKft, ELI ALPS, Dugon Ter 13, H-6720 Szeged, Hungary

关键词: Quantum field theory;    Quantum electrodynamics;    Non-perturbative method;    Finite temperature QFT;   

DOI  :  10.1016/j.nimb.2015.10.051

来源: Elsevier

【 摘 要 】

Infrared singularities in massless gauge theories are known since the foundation of quantum field theories. The root of this problem can, be tracked back to the very definition of these long-range interacting theories such as QED. It can be shown that singularities are caused by the massless degrees of freedom (i.e. the photons in the case of QED). In the Bloch-Nordsieck model the absence of the infrared catastrophe can be shown exactly by the complete summation of the radiative corrections. In this paper we will give the idea of the derivation of the Bloch-Nordsieck propagators, that describes the infrared structure of the electron propagation, at zero and finite temperatures. Some ideas of the possible applications are also mentioned. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free