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arXiv 1609.04655hep-th
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平坦空间中的光锋高自旋理论

Light-Front Higher-Spin Theories in Flat Space

Dmitry Ponomarev, E. D. Skvortsov

摘要:

我们重新讨论了平坦空间中高自旋场的相互作用问题。我们认为,所有的不去定理可以避免的光锥的方法,这导致更多的相互作用顶点相比,通常的协变方法。强调了高自旋场的二阶导数引力耦合。我们证明了等价原理的某些轮回对于更高自旋的场仍然成立--引力相互作用的强度不依赖于自旋。此外,从Metsaev的结果可以看出,在四维空间中存在一个完整的手征高自旋理论。我们给出了这个理论的一个简单的推导,并表明四点散射振幅为零。同时,我们重建了高自旋幺正理论中标量场的四次顶点,证明了它是微扰局域的。

英文摘要:

We revisit the problem of interactions of higher-spin fields in flat space. We argue that all no-go theorems can be avoided by the light-cone approach, which results in more interaction vertices as compared to the usual covariant approaches. It is stressed that there exist two-derivative gravitational couplings of higher-spin fields. We show that some reincarnation of the equivalence principle still holds for higher-spin fields - the strength of gravitational interaction does not depend on spin. Moreover, it follows from the results by Metsaev that there exists a complete chiral higher-spin theory in four dimensions. We give a simple derivation of this theory and show that the four-point scattering amplitude vanishes. Also, we reconstruct the quartic vertex of the scalar field in the unitary higher-spin theory, which turns out to be perturbatively local.

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