TL;DR
This paper examines the evolution of azimuthal asymmetries in TMDs, comparing low and high transverse momentum descriptions, and discusses the benefits of Bessel weighting for theoretical and lattice QCD analyses.
Contribution
It provides a comparative analysis of TMD and collinear factorization approaches for azimuthal asymmetries and highlights the advantages of Bessel weighting in TMD studies.
Findings
Scale dependence of asymmetries analyzed
Advantages of Bessel weighting demonstrated
Convergence and lattice evaluation benefits discussed
Abstract
In this contribution TMD evolution of azimuthal asymmetries, in particular of the Sivers and double Collins asymmetries, is addressed. A comparison of the scale dependence is made between asymmetries described with TMD factorization at low transverse momentum and those described with collinear factorization at high transverse momentum. Finally, the advantages of Bessel weighting are discussed: convergence of transverse momentum integrals, suppression of large transverse momentum contributions, and well-defined lattice QCD evaluations of Bessel-weighted TMDs including proper gauge links.
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