arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.08682hep-thhep-ph
收藏

该SU(2| 3)动态双环路形状因子

The SU(2|3) dynamic two-loop form factors

Andreas Brandhuber, Martyna Kostacinska, Brenda Penante, Gabriele Travaglini, Donovan Young

摘要:

我们计算了$N=4$超对称Yang-Mills的$SU(2|3)$闭子扇区中算子的双环形状因子.特别是,我们专注于非保护,三维运营商$\mathrm{Tr} (X[Y,Z])$和$\mathrm{Tr} ( ψψ)$,我们计算四个可能的两个循环形状因子,和相应的剩余功能,与外部状态$\langle \bar{X} \bar{Y} \bar{Z}|$和$\langle \barψ \barψ|$。有趣的是,$\langle\bar{X} \bar{Y} \bar{Z}| \mathrm{Tr} (X[Y,Z]) |0\rangle$的双环余项的最大超越部分与半BPS算子$\mathrm{Tr} (X^3)$的相应已知量相同。我们还发现了一个令人惊讶的连接之间的条款subleading在超越性和某些先验无关的剩余密度在SU(2)部门的自旋链哈密顿量的研究中引入。其次,我们用我们的计算解决了SU(2)中伸缩算符的混合、恢复反常维数和本征态|(3)两个回路上的扇区。我们还推测了我们在$N=4$ super Yang-Mills和Higgs +多胶子振幅的QCD计算之间的潜在联系在一个有效的拉格朗日方法。

英文摘要:

We compute two-loop form factors of operators in the $SU(2|3)$ closed subsector of $N=4$ supersymmetric Yang-Mills. In particular, we focus on the non-protected, dimension-three operators $\mathrm{Tr} (X[Y,Z])$ and $\mathrm{Tr} ( ψψ)$ for which we compute the four possible two-loop form factors, and corresponding remainder functions, with external states $\langle \bar{X} \bar{Y} \bar{Z}|$ and $\langle \barψ \barψ|$. Interestingly, the maximally transcendental part of the two-loop remainder of $\langle\bar{X} \bar{Y} \bar{Z}| \mathrm{Tr} (X[Y,Z]) |0\rangle$ turns out to be identical to that of the corresponding known quantity for the half-BPS operator $\mathrm{Tr} (X^3)$. We also find a surprising connection between the terms subleading in transcendentality and certain a priori unrelated remainder densities introduced in the study of the spin chain Hamiltonian in the SU(2) sector. Next, we use our calculation to resolve the mixing, recovering anomalous dimensions and eigenstates of the dilatation operator in the SU(2|3) sector at two loops. We also speculate on potential connections between our calculations in $N=4$ super Yang-Mills and Higgs + multi-gluon amplitudes in QCD in an effective Lagrangian approach.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑