A combinatoric shortcut to evaluate CHY-forms
A combinatoric shortcut to evaluate CHY-forms
复制标题
评估 CHY 形式的组合捷径
DOI:
10.1007/jhep06(2017)015
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发表时间:
2017-01
影响因子:
5.4
通讯作者:
徐峰
中科院分区:
文献类型:
--
作者:
王天珩;陈刚;张若筠;徐峰
A bstractIn our recent work, we proposed a differential operator for the evaluation of the multi-dimensional residues on isolated (zero-dimensional) poles. In this paper we discuss some new insight on evaluating the (generalized) Cachazo-He-Yuan (CHY) forms of the scattering amplitudes using this differential operator. We introduce a tableau represen-tation for the coefficients appearing in the proposed differential operator. Combining the tableaux with the polynomial form of the scattering equations, the evaluation of the gen-eralized CHY form becomes a simple combinatoric problem. It is thus possible to obtain the coefficients arising in the differential operator in a straightforward way. We present the procedure for a complete solution of the n-gon amplitudes at one-loop level in a generalized CHY form. We also apply our method to fully evaluate the one-loop five-point amplitude in the maximally supersymmetric Yang-Mills theory; the final result is identical to the one obtained by Q-Cut.
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