Categorization of two-loop Feynman diagrams in the O(α^(2))correction to e^(+)e^(-)→ZH  

作　　者：Zhao Li Yefan Wang Quan-feng Wu 李钊;王烨凡;吴泉锋(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;School of Physics Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Center of High Energy Physics,Pek ing University,Beijing 100871,China)

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]School of Physics Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]Center of High Energy Physics,Pek ing University,Beijing 100871,China

出　　处：《Chinese Physics C》2021年第5期49-57,共9页中国物理C（英文版）

基　　金：the National Natural Science Foundation of China(11675185.12075251)。

摘　　要：The e^(+)e^(-)→ZHprocess is the dominant process for the Higgs boson production at the future Higgs fact-ory.In order to match the analysis on the Higgs properties with highly precise experiment data,it will be crucial to include the theoretical prediction to the full next-to-next-to-leading order electroweak effect in the production rate or(e^(+)e^(-)→ZH).In this inspiring work,we categorize the two-loop Feynman diagrams of theO(α^(2)))correction to e^(+)e^(-)→ZH into 6 categories according to relevant topological structures.Although 25377 diagrams contribute to the O(α^(2))correction in total,the number of the most challenging diagrams with seven denominators is 2250,which contain only 312 non-planar diagrams with 155 independent types.This categorization could be a valuable reference for the complete calculation in future.

关 键 词：CATEGORIZATION Higgsstrahlung O(α^(2))correction 

分 类 号：O572.214[理学—粒子物理与原子核物理]