Title
Transverse-momentum-dependent parton distributions at the edge of the lightconeTransverse-momentum-dependent parton distributions at the edge of the lightcone
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Elementary Particle Physics
Publication type
article
Publication
Subject
Physics
Source (journal)
International journal of modern physics: conference series
Volume/pages
4(2011), p. 135-145
ISSN
2010-1945
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
We present a completely gauge-invariant operator definition of transverse-momentum-dependent parton densities (TMD), supplied with longitudinal lightlike gauge links as well as transverse gauge links at lightcone infinity. Within this framework, we consider the consistent treatment of specific divergences, emerging in the "unsubtracted" TMD beyond the tree approximation, and construct the soft factors to cancel unphysical singularities. We confront this approach with factorization schemes, which make use of covariant gauges with off-the-lightcone gauge links, and discuss their mutual connection.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/019971/12eb3b96.pdf