Equivalence of light-front and covariant field theory
- 15 November 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 52 (10) , 5954-5979
- https://doi.org/10.1103/physrevd.52.5954
Abstract
In this paper we discuss the relation between the standard covariant quantum field theory and light-front field theory. We define covariant theory by its Feynman diagrams, whereas light-front field theory is defined in terms of light-cone time-ordered diagrams. A general algorithm is proposed that produces the latter from any Feynman diagram. The procedure is illustrated in several cases. Technical problems that occur in the light-front formulation and have no counterpart in the covariant formulation are identified and solved. The problem of renormalization is not discussed in this paper.Keywords
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