From correlation function to charge correlator
The charge detector is a natural candidate for an observable operator in collider physics, yet its studies are rare due to its infrared unsafe nature in perturbation theory. In this talk, I will introduce an attempt to improve our understanding of charge correlators. I will focus on the back-to-back limit, which is intimately related to the sequential lightcone limit of local correlation functions. I will use Soft-Collinear Effective Theory (SCET) to understand this limit from both the correlation function point of view and the weighted cross-section point of view, and explain how to bridge the two approaches using the conformal symmetry of QCD at the Wilson-Fisher fixed point.
朱华星 教授(北京大学)
理工楼1201