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7-11 September 2020
Center for Nuclear Femtography (SURA) and Center for Frontiers in Nuclear Science (SBU/BNL)
US/Eastern timezone

Determining the Nonperturbative Collins-Soper Kernel From TMD Observables Using Lattice QCD

11 Sep 2020, 11:32



Maximilian Schlemmer (University of Regensburg)


I present the lattice calculation and results for the nonpertrubative Collins-Soper (CS) kernel, which describes the energy-dependence of the transverse momentum-dependent parton distribution functions (TMDPDFs). The CS kernel is extracted from the ratios of the quasi-TMD taken at different momenta.
The analysis is done with dynamical fermions for different polarization cases of quasi-TMD observables with staple shaped Wilson lines, for three different CLS ensembles at different lattice spacing and fixed pion mass.
The non-perturbative lattice CS kernel shows good agreement with an experimental extraction of the CS kernel. Furthermore a comparison with two previous explorative lattice studies is presented.

Primary author

Maximilian Schlemmer (University of Regensburg)

Presentation Materials