BFKL坡密子、雷格斯胶子和Bern-Dixon-Smirnov振幅
BFKL Pomeron, Reggeized gluons and Bern-Dixon-Smirnov amplitudes
摘要：
在简要回顾了QCD和超对称（SUSY）规范理论中Regge过程的BFKL方法之后，我们提出了一种计算BFKL核的次-首阶修正的策略。它们可以根据不同的Reggeized胶子相互作用截面得到。相应的振幅可以在高能量散射的有效作用的框架中计算。在N=4的超对称性的情况下，也可以使用Bern-Dixon-Smirnov（BDS）分析。为此目的，在高能量的BDS振幅的分析性质的调查，以验证其自洽性。结果发现，对于外部粒子的数量大于5，这些振幅，超过一个循环，是不符合BFKL的方法，预测存在的Regge削减在某些物理通道。
英文摘要：
After a brief review of the BFKL approach to Regge processes in QCD and in supersymmetric (SUSY) gauge theories we propose a strategy for calculating the next-to-next-to-leading order corrections to the BFKL kernel. They can be obtained in terms of various cross-sections for Reggeized gluon interactions. The corresponding amplitudes can be calculated in the framework of the effective action for high energy scattering. In the case of N=4 SUSY it is also possible to use the Bern-Dixon-Smirnov (BDS) ansatz. For this purpose the analytic properties of the BDS amplitudes at high energies are investigated, in order to verify their self-consistency. It is found that, for the number of external particles being larger than five, these amplitudes, beyond one loop, are not in agreement with the BFKL approach which predicts the existence of Regge cuts in some physical channels.
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