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arXiv 2205.06339hep-phhep-th
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${\cal O}(αα_s)$对$H \to ZZ^*$修正的主积分

Master integrals for ${\cal O}(αα_s)$ corrections to $H \to ZZ^*$

Ekta Chaubey, Mandeep Kaur, Ambresh Shivaji

摘要:

我们提出了所有的费曼积分相关的${\mathcal O}(αα_s)$虚拟修正$H \rightarrow ZZ^*$衰变的分析结果。我们使用微分方程的方法来解决主积分,同时保持对所有粒子的质量,包括内部传播子的完全依赖。由于存在四个质量标度,我们遇到多个平方根。我们认为,所有发生的平方根不能合理化的同时,同时合理化给我们带来的积分$CY_3$流形。因此,我们合理化只有三个平方根同时和建设适当的ansätze获得dlog形式包含平方根,后获得一个epsilon因式分解形式的微分方程。我们提出的字母表和所有的边界常数出现在微分方程的解决方案的解析形式。主积分的结果用dlog单形式的陈氏迭代积分表示。

英文摘要:

We present analytic results for all the Feynman integrals relevant for ${\mathcal O}(αα_s)$ virtual corrections to $H \rightarrow ZZ^*$ decay. We use the method of differential equations to solve the master integrals while keeping the full dependence on the masses of all the particles including internal propagators. Due to the presence of four mass scales we encounter multiple square roots. We argue that all the occurring square roots can not be rationalized at the same time as a simultaneous rationalization brings us to integrals over $CY_3$ manifolds. Hence we rationalize only three square roots simultaneously and construct suitable ansätze to obtain dlog-forms containing the square root, after obtaining an epsilon-factorised form for the differential equations. We present the alphabet and the analytic form of all the boundary constants that appear in the solutions of the differential equations. The results for master integrals are expressed in terms of Chen's iterated integrals with dlog one-forms.

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