Light-Front Perturbation Without Spurious Singularities

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• 作者：Jerzy A. Przeszowski ; Elżbieta Dzimida-Chmielewska ; Jan Żochowski
• 刊名：Few-Body Systems
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：57
• 期：7
• 页码：527-532
• 全文大小：379 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Elementary Particles and Nuclei
  Nuclear Physics, Heavy Ions and Hadrons
  Atoms, Molecules, Clusters and Plasmas
  
• 出版者：Springer Wien
• ISSN：1432-5411
• 卷排序：57

文摘

A new form of the light front Feynman propagators is proposed. It contains no energy denominators. Instead the dependence on the longitudinal subinterval \(x^2_L = 2 x^{+} x^{-}\) is explicit and a new formalism for doing the perturbative calculations is invented. These novel propagators are implemented for the one-loop effective potential and various 1-loop 2-point functions for a massive scalar field. The consistency with results for the standard covariant Feynman diagrams is obtained and no spurious singularities are encountered at all. Some remarks on the calculations with fermion and gauge fields in QED and QCD are added.Download to read the full article text