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学术报告

发布人: admin 发布时间: 2017-08-28 16:00:33 浏览: 658 次

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报告题目:A Journey on Riemann Spheres: From Scattering Equations to Amplitudes and Form Factors 

报告时间:2017年9月4日星期一,下午3点 

报告地点:天津大学理学院32-140(新校区) 

报告人:刘正文博士(Université catholique de Louvain, Belgium)

报告摘要:The Cachazo-He-Yuan formalism expresses the S-matrix as a multiple integral over the moduli space of Riemann spheres with marked points, which is localised by a set of the scattering equations, for various field theories in any number of spacetime dimensions. In this talk, I will give a short introduction to the basic aspects of the scattering equations and CHY formulation, and then will also present some recent developments in this field with a special focus on four-dimensional spacetime.


报告题目: Soft theorems, memories and asymptotic symmetries 

报告时间:2017年9月4日星期一,下午4点 报告地点:天津大学理学院32-140(新校区) 

报告人:毛普健博士(中国科学院高能物理研究所) 

报告摘要:Soft theorems, memory effects, and asymptotic symmetries are shown in recent years to be mathematically equivalent. In this talk, I will give an overview of this fascinating triangle equivalence. In particular, I will explain in detail a very recent prescription to realize this triangle relation beyond the leading order. I will also comment on the extension of this triangle relation in arbitrary even dimensions.