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arXiv 1004.4735hep-th
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超扭量空间中3D和6D极大超共形理论的振幅

Amplitudes of 3D and 6D Maximal Superconformal Theories in Supertwistor Space

Yu-tin Huang, Arthur E. Lipstein

摘要:

我们利用超扭量空间构造了三维和六维的极大超共形理论的散射振幅。在这两种情况下,超共形不变性和合理性的约束意味着三点振幅在壳上消失,这限制了四点振幅在所有通道中具有消失的残留物。在三维空间中,我们找到了四点振幅的唯一解,并证明了它与BLG理论中的分量结果一致。这表明BLG是唯一的具有经典OSp(8)的三维理论|4)允许拉格朗日描述的对称性。我们还表明,可以从我们的N=8的结果,通过减少超对称性,这意味着最近在ABJM中发现的树级Yangian对称性也存在于BLG的ABJM理论的四点振幅。在六维空间中,我们发现一致性条件意味着所有的树级振幅消失。这使我们猜想,一个相互作用的六维理论与经典OSp(8| 4)对称性没有拉格朗日描述,局部或非局部的,除非(2,0)张量多重态被额外的自由度补充。

英文摘要:

We use supertwistor space to construct scattering amplitudes of maximal superconformal theories in three and six dimensions. In both cases, the constraints of superconformal invariance and rationality imply that the three-point amplitude vanishes on-shell, which constrains the four-point amplitude to have vanishing residues in all channels. In three dimensions, we find a unique solution for the four-point amplitude and demonstrate that it agrees with the component result in the BLG theory. This suggests that BLG is the unique three-dimensional theory with classical OSp(8|4) symmetry that admits a Lagrangian description. We also show that one can derive the four-point amplitude of the ABJM theory from our N=8 result by reducing the supersymmetry, which implies that the tree-level Yangian symmetry recently found in ABJM is also present in BLG. In six dimensions, we find that the consistency conditions imply that all tree-level amplitudes vanish. This leads us to conjecture that an interacting six-dimensional theory with classical OSp(8|4) symmetry does not have a Lagrangian description, local or nonlocal, unless the (2,0) tensor multiplets are supplemented by additional degrees of freedom.

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