Recursion Relations for Tree Amplitudes in Super Gauge Theories

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  • 16 January 2005
Abstract
Using newly proposed BCF recursion relations, compact formulas are obtained for tree-level n-gluon amplitudes of helicity structure --++...+. We then make an extension of these recursion relations to include fermions, from which MHV and \bar{MHV} amplitudes are reproduced. We also calculate non-MHV amplitudes of processes with two fermions and four gluons. Results thus obtained are equivalent to those obtained by extended CSW prescriptions, but disagree with those by conventional field theory calculations. This creates a puzzling situation.

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