Nonperturbative enhancement of superloop at strong coupling
Nonperturbative enhancement of superloop at strong coupling
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强耦合下超级环的非微扰增强
DOI：
10.1016/j.nuclphysb.2016.08.017
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
A. Belitsky
中科院分区：
文献类型：
--
作者：
A. Belitsky
我们解决了平面最大超对称杨-米尔斯理论中 t Hooft 耦合强值下 NMHV 六粒子散射振幅的近共线展开问题。我们通过双 superWilson 环路描述，通过研究伴随（或不伴随）大量磁通管激励的多个标量交换的影响，补充了五角大楼算子产品扩展背景下这一可观测值的最新研究。由于空穴具有非常小的、非微扰产生的质量 m h ，该质量在 t Hooft 耦合中呈指数抑制，因此它们的交换必须在紫外线极限 τ<1/m h 内恢复。这个过程对超级环的期望值产生了贡献，超级环与经典区域处于同等地位——这是早期在 MHV 振幅中观察到的现象。在所有组件中，近无质量的标量交换是从大质量粒子的标量交换中分解出来的，处于强耦合的主导顺序。
We address the near-collinear expansion of NMHV six-particle scattering amplitudes at strong value of the't Hooft coupling in planar maximally supersymmetric Yang–Mills theory. We complement recent studies of this observable within the context of the Pentagon Operator Product Expansion, via the dual superWilson loop description, by studying effects of multiple scalar exchanges that accompany (or not) massive flux-tube excitations. Due to the fact that holes have a very small, nonperturbatively generated mass m h which is exponentially suppressed in the't Hooft coupling, their exchanges must be resummed in the ultraviolet limit, τ≪ 1/m h. This procedure yields a contribution to the expectation value of the superloop which enters on equal footing with the classical area—a phenomenon which was earlier observed for MHV amplitudes. In all components, the near-massless scalar exchanges factorize from the ones of massive particles, at leading order in strong coupling.
影响因子：
5.4
作者：
L. Mason;David Skinner
通讯作者：
L. Mason;David Skinner