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Title: Collins-Soper kernel from lattice QCD at the physical pion mass

Journal Article · · Physical Review. D.

This work presents a determination of the quark Collins-Soper kernel, which relates transverse-momentum-dependent parton distributions at different rapidity scales, using lattice QCD. This is the first lattice QCD calculation of the kernel at quark masses corresponding to a close-to-physical value of the pion mass, with next-to-next-to-leading logarithmic matching to transverse-momentum-dependent parton distributions from the corresponding lattice-calculable distributions, and includes a complete analysis of systematic uncertainties arising from operator mixing. The kernel is extracted at transverse momentum scales 240 MeV ≲ qT ≲ 1.6 GeV with a precision sufficient to begin to discriminate between different phenomenological models in the nonperturbative region.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)
Grant/Contract Number:
AC02-07CH11359; SC0011090; AC02-06CH11357; SC0021006; AC02-05CH11231
OSTI ID:
1993301
Alternate ID(s):
OSTI ID: 2526249; OSTI ID: 2234319
Report Number(s):
FERMILAB-PUB--23-375-T; arXiv:2307.12359; MIT-CTP/5587; oai:inspirehep.net:2679743
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 11 Vol. 108; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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