1207.3473 (Gang Chen et al.)

Ward Identity implied recursion relation at loop level    [PDF]

Gang Chen, Yun Zhang

In this article, we discuss the Ward identity for the vector currents in pure Yang-Mills theory with a pair of external lines complexified. We classify the cancelation details among the terms in the Ward identity for both tree level currents and one loop currents. According to this, we find a new recursion relation for the full amplitudes and vector currents at tree-level and one loop-level. Using the new recursion relation, we obtain an efficient technique for the calculation of tree and one loop amplitudes in Yang-Mills theory.

View original: http://arxiv.org/abs/1207.3473