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http://localhost:8080/xmlui/handle/20.500.12421/257| Title: | Λ scattering equations |
| Authors: | Gomez, Humberto |
| Keywords: | Differential and Algebraic Geometry Field Theories in Higher Dimensions Scattering Amplitudes Superstrings and Heterotic Strings |
| Issue Date: | 1-Jun-2016 |
| Publisher: | Springer Verlag |
| Abstract: | Abstract: The CHY representation of scattering amplitudes is based on integrals over the moduli space of a punctured sphere. We replace the punctured sphere by a double-cover version. The resulting scattering equations depend on a parameter Λ controlling the opening of a branch cut. The new representation of scattering amplitudes possesses an enhanced redundancy which can be used to fix, modulo branches, the location of four punctures while promoting Λ to a variable. Via residue theorems we show how CHY formulas break up into sums of products of smaller (off-shell) ones times a propagator. This leads to a powerful way of evaluating CHY integrals of generic rational functions, which we call the Λ algorithm. © 2016, The Author(s). |
| URI: | https://repository.usc.edu.co/handle/20.500.12421/257 |
| ISSN: | 11266708 |
| Appears in Collections: | Artículos Científicos |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| -scattering-equationsJournal-of-High-Energy-Physics.pdf | 1.64 MB | Adobe PDF | View/Open |
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