[NT/RBRC hybrid seminar] One-loop structure of twist-4 PDFs for gluon condensate and topological charge

by Dr Shuai Zhao (Old Dominion University)

Friday 15 Apr 2022, 11:00 → 12:30 US/Eastern

Large seminar room (https://bnl.zoomgov.com/j/1619142030?pwd=azYvcU5tdDFYemYrWGJ4L0YwRG5NZz09)

Parton distribution functions (PDFs) are important tools for accessing hadron structure. Recently, a twist-4 gluon PDF F(x) has been introduced to explore the gluon condensate and mass structure in the nucleon. In this talk, I will introduce our recent work on the one-loop structure of F(x). Especially, I will present our results about the zero modes contribution. To enforce strict compliance with the gauge invariance requirements, we have used on-shell states for external gluons and obtained identical results in Feynman and light-cone gauges. The one-loop structure of another twist-4 PDF that is defined with the topological operator will also be discussed.