Title
Wilson lines in the operator definition of TMDs : spin degrees of freedom and renormalization Wilson lines in the operator definition of TMDs : spin degrees of freedom and renormalization
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Subject
Physics
Source (journal)
arXiv
Volume/pages
(2011) , p. 1-5
Carrier
E-only publicatie
Target language
English (eng)
Affiliation
University of Antwerp
Abstract
A generalized idea of gauge invariance, that embodies into the Wilson lines the spin-dependent Pauli term ∼Fμν[γμ,γν], is applied to set up a new framework for the operator definition of transverse-momentum-dependent parton densities (TMDs). We show that such a treatment of gauge invariance is justified, since it does not change the leading-twist behavior of the TMDs, albeit it contributes to their twist-three properties, in particular, to their anomalous dimensions. We discuss other consequences of this generalization and its possible applications to lattice simulations of the TMDs.
E-info
https://repository.uantwerpen.be/docman/iruaauth/fa6d54/f2ead50be43.pdf
Handle