Boundary Contributions Using Fermion Pair Deformation

Details Boundary Contributions Using Fermion Pair Deformation Boundary Contributions Using Fermion Pair Deformation

2011-09-09

arxiv.org/abs/1109.1887v1

JHEP 1112 (2011) 057

Physics

High Energy Physics

High Energy Physics - Theory

26 pages, 4 figures

Scientific paper

10.1007/JHEP12(2011)057

Continuing the study of boundary BCFW recursion relation of tree level amplitudes initiated in \cite{Feng:2009ei}, we consider boundary contributions coming from fermion pair deformation. We present the general strategy for these boundary contributions and demonstrate calculations using two examples, i.e, the standard QCD and deformed QCD with anomalous magnetic momentum coupling. As a by-product, we have extended BCFW recursion relation to off-shell gluon current, where because off-shell gluon current is not gauge invariant, a new feature must be cooperated.

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