Eur. Phys. J. A (2016) 52: 153
https://doi.org/10.1140/epja/i2016-16153-7

Review

An overview of transverse-momentum-dependent factorization and evolution

¹ Department of Physics, Old Dominion University, 12000 Jefferson Avenue, 23529, Norfolk, VA, USA
² Theory Center, Jefferson Lab, 23606, Newport News, VA, USA

^* e-mail: trogers@jlab.org

Received: 9 September 2015
Accepted: 20 September 2015
Published online: 17 June 2016

Abstract

I review TMD factorization and evolution theorems, with an emphasis on the treatment by Collins and originating in the Collins-Soper-Sterman (CSS) formalism. I summarize basic results while attempting to trace their development over that past several decades.