Determination of the Collins-Soper Kernel from Lattice QCD

被引：43
|
作者：
Schlemmer, Maximilian [1 ]
Vladimirov, Alexey [1 ]
Zimmermann, Christian [1 ]
Engelhardt, Michael [2 ]
Schaefer, Andreas [1 ]
机构：
[1] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany
[2] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2021年 / 2021卷 / 08期
关键词：
Lattice QCD; Resummation;
D O I：
10.1007/JHEP08(2021)004
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We present lattice results for the non-perturbative Collins-Soper (CS) kernel, which describes the energy-dependence of transverse momentum-dependent parton distributions (TMDs). The CS kernel is extracted from the ratios of first Mellin moments of quasi-TMDs evaluated at different nucleon momenta. The analysis is done with dynamical N-f = 2 + 1 clover fermions for the CLS ensemble H101 (a = 0.0854 fm, m(pi) = m(K) = 422 MeV). The computed CS kernel is in good agreement with experimental extractions and previous lattice studies.
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页数：26
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