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Universality of the Collins-Soper kernel in lattice calculations

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Shu, Hai-Tao ; Schlemmer, Maximilian ; Sizmann, Tobias ; Vladimirov, Alexey ; Walter, Lisa ; Engelhardt, Michael ; Schäfer, Andreas ; Yang, Yi-Bo
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Date of publication of this fulltext: 08 Feb 2024 13:31


The Collins-Soper (CS) kernel is a nonperturbative function that characterizes the rapidity evolution of transverse-momentum-dependent parton distribution functions (TMDPDFs) and wave functions. In this paper, we calculate the CS kernel for pion and proton targets and for quasi-TMDPDFs of leading and next-to-leading power. The calculations are carried out on the CLS ensemble H101 with dynamical ...


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