Amplituhedron meets Jeffrey–Kirwan residue
Amplituhedron meets Jeffrey–Kirwan residue
复制标题
幅面体遇上 JeffreyâKirwan 残基
DOI:
10.1088/1751-8121/aaf3c3
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
M. Parisi
中科院分区:
文献类型:
--
作者:
L. Ferro;T. Lukowski;M. Parisi
The tree amplituhedra are mathematical objects generalising the notion of polytopes into the Grassmannian. Proposed for as a geometric construction encoding tree-level scattering amplitudes in planar super Yang–Mills theory, they are mathematically interesting for any. In this paper we strengthen the relation between scattering amplitudes and geometry by linking the amplituhedron to the Jeffrey–Kirwan residue, a powerful concept in symplectic and algebraic geometry. We focus on a particular class of amplituhedra in any dimension, namely cyclic polytopes, and their even-dimensional conjugates. We show how the Jeffrey–Kirwan residue prescription allows to extract the correct amplituhedron volume functions in all these cases. Notably, this also naturally exposes the rich combinatorial and geometric structures of amplituhedra, such as their regular triangulations.
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发表时间:
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期刊:
Eur. J. Comb.
影响因子:
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