Abstract
In this paper, we generalize the integration rules for scattering equations to situations where higher-order poles are present. We describe the strategy to deduce the Feynman rules of higher-order poles from known analytic results of simple CHY-integrands, and propose the Feynman rules for single double pole and triple pole as well as duplex-double pole and triplex-double pole structures. We demonstrate the validation and strength of these rules by ample non-trivial examples.
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ArXiv ePrint: 1604.07314
The unconventional ordering is to let authors get proper recognition of contributions under the outdated practice in China. (Rijun Huang)
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Huang, R., Feng, B., Luo, Mx. et al. Feynman rules of higher-order poles in CHY construction. J. High Energ. Phys. 2016, 13 (2016). https://doi.org/10.1007/JHEP06(2016)013
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DOI: https://doi.org/10.1007/JHEP06(2016)013