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量子场论中的振幅体：从SYM到ABJM（图）
量子场论 振幅体 SYM ABJM
2023/2/23
20世纪物理学两大革命（狭义相对论和量子力学）结合的产物--量子场论已被公认为描述自然的基本理论框架，以此为基础的粒子物理标准模型得到了广泛的实验验证。散射振幅作为量子场论中核心的观测量，搭建起了联系理论与实验的主要桥梁。其原始动机来源于在对比理论与实验数据方面的重要应用价值：无论是现有的还是未来的高能实验，都需要更加精确、快速地计算场论振幅；引力和弯曲时空场论的微扰计算对引力波、早期宇宙等物理也...
Beyond cusp anomalous dimension from integrability in SYM$_4$
Beyond cusp anomalous dimension integrability
2010/12/23
We study the first sub-leading correction $O((\ln s)^0)$ to the cusp anomalous dimension in the high spin expansion of finite twist operators in ${\cal N}=4$ SYM theory. This term is still governed b...
On KLT and SYM-supergravity relations from 5-point 1-loop amplitudes
KLT SYM-supergravity relations 5-point 1-loop amplitudes
2010/12/23
We derive a new non-singular tree-level KLT relation for the $n=5$-point amplitudes, with manifest $2(n-2)!$ symmetry, using information from one-loop amplitudes and IR divergences, and speculate how...
On form factors in N=4 sym
form factors N=4 sym
2010/12/23
In this paper we study the form factors for the half-BPS operators $\mathcal{O}^{(n)}_I$ and the $\mathcal{N}=4$ stress tensor supermultiplet current $W^{AB}$ up to the second order of perturbation th...
Dimensionally reduced SYM$_4$ at large-$N$: an intriguing Coulomb approximation
Coulomb approximation High Energy Physics
2010/12/23
We consider the light-cone (LC) gauge and LC quantization of the dimensional reduction of super Yang Mills theory from four to two dimensions. After integrating out all unphysical degrees of freedom, ...
Quantum 't Hooft loops of SYM N=4 as instantons of YM_2 in dual groups SU(N) and SU(N)/Z_N
Quantum 't Hooft loops SYM N=4 YM_2
2010/12/22
A relation between circular 1/2 BPS 't Hooft operators in 4d N=4 SYM and instantonic solutions in 2d Yang-Mills theory (YM_2) has recently been conjectured. Localization indeed predicts that those 't ...