From multileg loops to trees (by-passing Feynman's Tree Theorem)
Jul, 2008
6 pages
Published in:
- Nucl.Phys.B Proc.Suppl. 183 (2008) 262-267
Contribution to:
e-Print:
- 0807.0531 [hep-th]
Report number:
- SLAC-PUB-14635,
- FERMILAB-PUB-08-259-T,
- IFIC-08-35
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Abstract: (arXiv)
We illustrate a duality relation between one-loop integrals and single-cut phase-space integrals. The duality relation is realised by a modification of the customary +i0 prescription of the Feynman propagators. The new prescription regularizing the propagators, which we write in a Lorentz covariant form, compensates for the absence of multiple-cut contributions that appear in the Feynman Tree Theorem. The duality relation can be extended to generic one-loop quantities, such as Green's functions, in any relativistic, local and unitary field theories.References(4)
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