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arXiv · 1508.07975

ABJM Amplitudes in U-gauge and a Soft Theorem

Seungbeom Chin·Sangmin Lee·Youngbin Yun
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Abstract

We report progress in computing and analyzing all tree amplitudes in ABJM theory. Inspired by the isomorphism between the orthogonal Grassmannian and the pure spinor geometries, we adopt a new gauge, called u-gauge, for evaluating the orthogonal Grassmannian integral for ABJM amplitudes. We carry out the integral explicitly for the 8-point amplitude and obtain the complete supersymmetric amplitude. The physical and spurious poles arise from the integral as expected from on-shell diagrams. We also derive a double scalar soft theorem of ABJM amplitudes and verify it for known amplitudes.

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Seungbeom Chin, Sangmin Lee, Youngbin Yun. 2015-09-14. ABJM Amplitudes in U-gauge and a Soft Theorem. https://doi.org/10.1007/jhep11(2015)088

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