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arXiv 2401.00129hep-thastro-ph.COgr-qchep-ph
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通过广义分部积分关系系统评估德西特关联函数

Towards Systematic Evaluation of de Sitter Correlators via Generalized Integration-By-Parts Relations

Jiaqi Chen, Bo Feng

AI总结:

本文将IBP与微分方程方法推广至暴胀德西特关联函数,揭示顶点积分族的因式分解结构,并给出任意族迭代约化与d log微分方程的普适公式。

摘要:

我们将分部积分(IBP)和微分方程方法推广到与暴胀相关的德西特关联函数。尽管德西特时空中的有质量关联函数通常被认为极为复杂,但我们从IBP的视角发现它们具有显著且隐藏的简洁结构。我们发现了对应于$\mathrm{d} τ_i$积分的每个顶点积分族的IBP关系的因式分解。此外,通过巧妙构造主积分,我们提出并证明了任意顶点积分族的迭代约化和$\mathrm{d} \log$形式微分方程的普适公式。这些公式支配所有树级德西特关联函数,并在圈级中也发挥核心作用。

英文摘要:

We generalize Integration-By-Parts (IBP) and differential equations methods to de Sitter correlators related to inflation. While massive correlators in de Sitter spacetime are usually regarded as highly intricate, we find they have remarkably hidden concise structures from the perspective of IBP. We find the factorization of the IBP relations of each vertex integral family corresponding to $\mathrm{d} τ_i$ integration. Furthermore, with a smart construction of master integrals, the universal formulas for iterative reduction and $\mathrm{d} \log$-form differential equations of arbitrary vertex integral family are presented and proved. These formulas dominate all tree-level de Sitter correlators and play a kernel role at the loop-level as well.

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。

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