Equality of Two Definitions for Transverse Momentum Dependent Parton Distribution Functions

John C. Collins, Ted C. Rogers

Published 2012-10-07, updated 2012-11-08Version 2

We compare recent, seemingly different, approaches to TMD-factorization (due to Echevarria, Idilbi, and Scimemi and to Collins), and show that they are the same, apart from an apparent difference in their definition of the \MSbar{} renormalization scheme.