Evolution of the helicity and transversity Transverse-Momentum-Dependent parton distributions

preprint2013arXivOpen access

Abstract

We examine the QCD evolution of the helicity and transversity parton distribution functions when including also their dependence on transverse momentum. Using an appropriate definition of these polarized transverse momentum distributions (TMDs), we describe their dependence on the factorization scale and rapidity cutoff, which is essential for phenomenological applications.

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