报告题目：The?Surprising?Emergent?Phenomena?of?Perturbative?QCD
报告人：??Andrew?Larkoski??研究员
报告人单位：Center?for?the?Fundamental?Laws?of?Nature,?Havard?Univerisity
报告时间：2016年7月25日（周一）上午11:00-12:30
报告地点：北京大学物理西楼206会议室
摘要：The?standard?lore?says?that?the?only?observables?that?are?calculable?within?perturbation?theory
in?QCD?or?any?gauge?theory?are?those?that?are?infrared?and?collinear?safe.??Recently,?we?have
discovered?observables?that?are?not?infrared?and?collinear?safe,?yet?are?calculable?in?perturbation
theory?when?all?orders?effects?are?included.??We?refer?to?these?observables?as?Sudakov?safe?and
unlike?infrared?and?collinear?safe?observables,?their?distributions?have?non-analytic?dependence
on?the?coupling.??In?this?talk,?I?will?discuss?one?Sudakov?safe?observable?which?exhibits?independence
on?the?coupling?and?manifests?the?universal?collinear?splitting?functions.
