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arXiv 2004.10797hep-th
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手征高自旋引力的单圈对称性

One-loop Finiteness of Chiral Higher Spin Gravity

Evgeny Skvortsov, Tung Tran

摘要:

更高自旋引力背后的主要思想之一是,更高的自旋对称性预计不会为反项留下空间,从而消除了使纯引力不可重整化的UV发散。然而,直到最近,人们还不清楚这种机制是否能够实现。我们证明了手征高自旋引力是单圈有限的,关键点是所有的单圈$S$矩阵元素是UV收敛的,尽管这个理论是天真的不可重正化的功率计数。对于任意数量的腿,单圈$S$矩阵元与纯QCD和SDYM中的全加螺旋度单圈振幅一致,模为一定的高自旋敷料,这是非引力理论与高自旋引力之间的一种不寻常的关系。

英文摘要:

One of the main ideas behind Higher Spin Gravities is that the higher spin symmetry is expected to leave no room for counterterms, thereby eliminating UV divergences that make the pure gravity non-renormalizable. However, until recently it has not been clear if such a mechanism is realized. We show that Chiral Higher Spin Gravity is one-loop finite, the crucial point being that all one-loop $S$-matrix elements are UV-convergent despite the fact that the theory is naively not renormalizable by power counting. For any number of legs the one-loop $S$-matrix elements coincide with all-plus helicity one-loop amplitudes in pure QCD and SDYM, modulo a certain higher spin dressing, which is an unusual relation between the non-gravitational theories and a higher spin gravity.

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