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http://dspace.mediu.edu.my:8181/xmlui/handle/10261/4065| Title: | From loops to trees by-passing Feynman's theorem |
| Keywords: | NLO computations QCD |
| Description: | We derive a duality relation between one-loop integrals and phase-space
integrals emerging from them through single cuts. The duality relation
is realized 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 applied to generic one-loop quantities in
any relativistic, local and unitary field theories.
It is suitable for applications to the analytical calculation of
one-loop scattering amplitudes, and to the numerical evaluation of
cross-sections at next-to-leading order. Peer reviewed |
| URI: | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/4065 |
| Other Identifiers: | http://hdl.handle.net/10261/4065 |
| Appears in Collections: | Digital Csic |
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