A Note on Single Soft Scalar Emission of $\mathcal{N}=8$ SUGRA and $E_{7(7)}$ Symmetry

Details A Note on Single Soft Scalar Emission of $\mathcal{N}=8$ SUGRA and $E_{7(7)}$ Symmetry A Note on Single Soft Scalar Emission of $\mathcal{N}=8$ SUGRA and $E_{7(7)}$ Symmetry

2008-12-24

arxiv.org/abs/0812.4533v2

JHEP 1007:025,2010

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, 3 figures; some clarifications made, new references added

Scientific paper

10.1007/JHEP07(2010)025

We study single soft scalar emission amplitudes of $\mathcal{N}=8$ supergravity (SUGRA) at the one-loop level using an explicit formula for one-loop amplitudes in terms of tree amplitudes, which in turn are evaluated using supersymmetric BCFW recursion relations. It turns out that the infrared finite parts of all such amplitudes vanish in the soft momentum limit, which supports the conjecture that $E_{7(7)}$ symmetry has no anomalies at the one-loop level.

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