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Title: Determination of the Collins-Soper Kernel from Lattice QCD

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [2];  [3];  [2]
  1. Univ. of Regensburg (Germany). Inst. for Theoretical Physics; New Mexico State Univ., Las Cruces, NM (United States)
  2. Univ. of Regensburg (Germany). Inst. for Theoretical Physics
  3. New Mexico State Univ., Las Cruces, NM (United States). Dept. of Physics

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 Nf = 2 + 1 clover fermions for the CLS ensemble H101 (a = 0. 0854 fm, m π = mK = 422 MeV). The computed CS kernel is in good agreement with experimental extractions and previous lattice studies.

Research Organization:
New Mexico State Univ., Las Cruces, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG02-96ER40965
OSTI ID:
1850110
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 8 Vol. 2021; ISSN 1029-8479
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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