Time ordering, energy ordering, and factorization
Abstract
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.
- Publication:
-
Journal of Mathematical Physics
- Pub Date:
- July 2000
- DOI:
- arXiv:
- arXiv:hep-ph/9907490
- Bibcode:
- 2000JMP....41.4497L
- Keywords:
-
- 11.15.-q;
- 02.30.Rz;
- 12.38.Aw;
- Gauge field theories;
- Integral equations;
- General properties of QCD;
- High Energy Physics - Phenomenology;
- Mathematical Physics
- E-Print:
- 16 pages in revtex