Determination of the Collins-Soper Kernel from Lattice QCD

Avkhadiev, Artur; Shanahan, Phiala E.; Wagman, Michael L.; Zhao, Yong

doi:10.1103/PhysRevLett.132.231901

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

Journal Article · 03 June 2024 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.132.231901 · OSTI ID:2369891

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This Letter presents a determination of the quark Collins-Soper kernel, which relates transverse-momentum-dependent parton distributions (TMDs) at different rapidity scales, using lattice quantum chromodynamics (QCD). This is the first such determination with systematic control of quark mass, operator mixing, and discretization effects. Next-to-next-to-leading logarithmic matching is used to match lattice-calculable distributions to the corresponding TMDs. The continuum-extrapolated lattice QCD results are consistent with several recent phenomenological parametrizations of the Collins-Soper kernel and are precise enough to disfavor other parametrizations. Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0011090; AC02-06CH11357; SC0021006; AC02-05CH11231; AC02-07CH11359

OSTI ID:: 2369891

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 132; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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