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

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.

11 pages, 4 figures

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• Structure of the nucleon at leading and subleading twist in the covariant parton model
• Disentangling Long and Short Distances in Momentum-Space TMDs
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• One-loop Matching for Spin-Dependent Quasi-TMDs
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• Model predictions for azimuthal spin asymmetries for HERMES and COMPASS kinematics
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• Transverse single spin asymmetry $A_{UT}^{\sin ({\varphi }_h-{\varphi }_S)}$ for single hadron production in SIDIS
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• Kotzinian-Mulders effect in semi-inclusive DIS within TMD factorization
• Linearly polarised Transverse Momentum Dependent Parton Distribution Function at NNLO in QCD