RT Journal Article
T1 Universality of the Collins-Soper kernel in lattice calculations
A1 Shu, Hai-Tao
A1 Schlemmer, Maximilian
A1 Sizmann, Tobias
A1 Vladimirov, Alexey
A1 Walter, Lisa
A1 Engelhardt, Michael
A1 Schäfer, Andreas
A1 Yang, Yi-Bo
AB 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 Nf=2+1 clover-improved Wilson fermions. Our analyses demonstrate the consistency of different lattice extractions of the CS kernel for mesons and baryons, as well as for twist-Two and twist-Three operators, even though lattice artifacts could be significant. This consistency corroborates the universality of the lattice-determined CS kernel and suggests that a high-precision determination of it is in reach.
PB American Physical Society
SN 2470-0010
YR 2023
FD 2023-10-31
LK https://hdl.handle.net/20.500.14352/102565
UL https://hdl.handle.net/20.500.14352/102565
LA eng
NO 2023 Descuento SCOAP
NO National Natural Science Foundation of China
NO Deutsche Forschungsgemeinschaft
NO Chinese Academy of Sciences
NO Comunidad de Madrid
NO Ministerio de Ciencia e Innovación (España)
NO United States Department of Energy
DS Docta Complutense
RD 18 abr 2025