Time Ordering, Energy Ordering, and Factorization

Details Time Ordering, Energy Ordering, and Factorization Time Ordering, Energy Ordering, and Factorization

1999-07-26

arxiv.org/abs/hep-ph/9907490v1

J.Math.Phys. 41 (2000) 4497-4507

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages in revtex

Scientific paper

Relations between integrals of time-ordered product of operators, and their representation in terms of energy-ordered products are studied. Both can be decomposed into irreducible factors and these relations are discussed as well. The energy-ordered representation was invented to separate various infrared contributions in gauge theories. It is shown that the irreducible time-ordered expressions can be used to accomplish the same purpose. Besides, it has the added advantage of being factorizable.

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