Revisiting the time-ordering issue of TMD soft factors: causality, coordinate space analyticity and new equalities - Liu, Yizhuang (The journal of high energy physics, 2024)
Keywords: Causality; Classical and Quantum Gravitation; Correlation Functions; Elementary Particles; Equality; Euclidean geometry; Form factors; Higher-Order Perturbative Calculations; Light; Perturbation theory; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Theoretical Physics; Relativity Theory; Renormalization and Regularization; String Theory; Wilson, ’t Hooft and Polyakov loops; Wilson, ’t Hooft and Polyakov loops; Correlation Functions; Renormalization and Regularization; Higher-Order Perturbative Calculations