报告题目： Analytic Two-loop Higgs Amplitudes and Their Hidden Structures

报告人： 杨刚 副研究员（ 中科院理论所）

报告时间： 2019 年 12月5日（ 周四） 15： 30 ~ 16： 30

报告地点： 北洋园校区理学院32教256

报告摘要：

The discovery of a standard-model-like Higgs boson at LHC set a milestone in particle physics. For probing potential new physics beyond the Standard Model as well as understanding the details of Higgs physics, the high precision computation of Higgs amplitudes is mandatory. We obtain the two-loop Higgs plus three-parton amplitudes with high dimension operators in Higgs effective field theory. While efficient new methods are developed in the computation, a particular focus will be on the analytic structure of the results, which take remarkably simple form and show hidden relations. In particular, the results satisfy the so-call maximal transcendentality principle, which conjectures that QCD and N=4 SYM results share the same leading transcendental parts. The simplicity of the results and the surprising correspondence indicate there should be further hidden analytic structure to be uncovered which may also lead to a better way in computation.

报告人简历：杨刚老师2004年本科毕业于上海交通大学， 2009年于中科院理论所获博士学位。 2009至2016年分别于英国伦敦玛丽女王大学、 德国汉堡大学、 德国柏林洪堡大学博士后研究； 2016年起任中科院理论所副研究员。

代表作：

【1】 Q.Jin, G. Yang, "Analytic Two-Loop Higgs Amplitudes in Effective Field Theory and the Maximal Transcendentality Principle”, Phys.Rev.Lett. 121 (2018) 101603.

【2】 R. Boels, T. Huber, G. Yang, "Four-Loop Non-Planar Cusp Anomalous Dimension in N=4 SYM”, Phys.Rev.Lett. 119 (2017) 201601.

【3】 G. Yang, "Color-Kinematics Duality and Sudakov Form Factor at Five Loops in N=4 SYM”, Phys.Rev.Lett. 117 (2016) 271602.

【4】 G. Yang, "Scattering amplitudes at strong coupling for 4K gluons", JHEP 1012 (2010) 082.

【5】 Z. Xiao, C. Zhu, G. Yang, "The Rational Part of QCD Amplitude. III. The Six-Gluon", Nucl.Phys. B758 (2006) 53-89.

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