首 页机构概况机构设置科研人才队伍合作交流研究生教育博士后图书馆创新文化党群园地院重点实验室彭桓武中心信息公开
  学术活动
  您现在的位置:首页 > 学术活动 > 专题学术报告/Seminar
(Seminar) Pfaffian Diagrams for Gluon Tree Amplitudes
2018-05-28  【 】【打印】【关闭

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

 Chinese Academy of Sciences

Seminar

Title

题目

Pfaffian Diagrams for Gluon Tree Amplitudes

Speaker

报告人

C.S. Lam

Affiliation

所在单位

McGill/UBC

Date

日期

2018年5月28日 13:00

Venue

地点

Conference Room 6420, ITP new building

Abstract

摘要

n-gluon scattering amplitudes are usually represented by Feynman diagrams. In this talk, I will discuss a completely different diagrammatic description based on the CHY theory. Whereas Feynman diagrams build up the final amplitufe from local interactions and propagations,  pfaffian diagrams give an integral approach describing the final result in one shot. They may be thought of as a way to regroup Feynman diagrams with similar numerators in the amplitude. This regrouping produce subsets of diagrams that are gauge-invariant for n-2 gluons, a property that is very useful in checking correctness of the calculation. Since the amplitude has been partly processed, Pfaffian diagrams often give rise to fewer number of terms than Feynman diagrams.

Contact person

所内联系人

Song He

 

IE6.0浏览器,1024X768分辨率 版权所有 © 中国科学院理论物理研究所
地址:北京市海淀区中关村东路55号 邮政编码:100190
京ICP备05002865号】 京公网安备1101080094号