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New multiple soft theorem from split-helicity amplitude decomposition (2503.13363v1)

Published 17 Mar 2025 in hep-th

Abstract: We investigate the soft decomposition of tree level gluon amplitudes of split-helicity configuration. First, we show how any split-helicity amplitude can be fully fixed from inverse soft limit using BCFW calculation. We show how the double and triple soft theorem can manifest beyond perturbative calculation from split-helicity decomposition. Next, we obtain a compact formula for the corresponding soft operators which is a simple combination of individual single soft operators. Then we generate the leading and sub-leading soft factors using soft momentum expansion, to compare with results derived from standard calculation.

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