Off-Shell CHY Amplitudes and Feynman Graphs
| Autor: | Peter Goddard, Louise Dolan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
High Energy Physics - Theory
Nuclear and High Energy Physics Polynomial Nuclear Theory Shell (structure) FOS: Physical sciences Field Theories in Higher Dimensions 01 natural sciences symbols.namesake 0103 physical sciences Physics::Atomic and Molecular Clusters Feynman diagram lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Scattering Amplitudes 010306 general physics Mathematical physics Physics Recurrence relation Field Theories in Lower Dimensions 010308 nuclear & particles physics Scattering Expression (computer science) Scattering amplitude Massless particle High Energy Physics - Theory (hep-th) symbols lcsh:QC770-798 |
| Zdroj: | Journal of High Energy Physics, Vol 2020, Iss 4, Pp 1-19 (2020) Journal of High Energy Physics |
| Popis: | A polynomial form is established for the off-shell CHY scattering equations proposed by Lam and Yao. Re-expressing this in terms of independent Mandelstam invariants provides a new expression for the polynomial scattering equations, immediately valid off shell, which makes it evident that they yield the off-shell amplitudes given by massless $\phi^3$ Feynman graphs. A CHY expression for individual Feynman graphs, valid even off shell, is established through a recurrence relation. Comment: 19 pages, clarification of equations (1.13), (3.7), (3.9), added Comments, corrected reference |
| Databáze: | OpenAIRE |
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