Transverse momentum structure of proton within the basis light-front quantization framework

Hu, Zhi; Xu, Siqi; Mondal, Chandan; Zhao, Xingbo; Vary, James P.

doi:10.1016/j.physletb.2022.137360

Title: Transverse momentum structure of proton within the basis light-front quantization framework

Journal Article · 01 August 2022 · Physics Letters. B

DOI: https://doi.org/10.1016/j.physletb.2022.137360 · OSTI ID:2278936

^[1]; Xu, Siqi ^[2];

^[2];

^[3]

University of Chinese Academy of Sciences, Beijing (China); Chinese Academy of Sciences, Gansu (China); Chinese Academy of Sciences, Lanzhou (China); Iowa State University
University of Chinese Academy of Sciences, Beijing (China); Chinese Academy of Sciences, Gansu (China); Chinese Academy of Sciences, Lanzhou (China)
Iowa State University, Ames, IA (United States)

We obtain the leading-twist valence quark transverse-momentum-dependent parton distribution functions (TMD PDFs) for the proton within the basis light-front quantization (BLFQ) framework. Our results are consistent with lattice QCD calculations and our previous results for the collinear limit. We also obtain consistency with the Soffer-type bounds. Within our approach, we find that six T-even TMDs in the leading twist are all independent of each other, and previously found model-dependent relations do not hold. This is a promising sign that our results are representative of future, more extensive treatments of QCD. Furthermore, we obtain a non-trivial x-dependence of the <(p^⊥)²> and some consistency with the Gaussian ansatz but only in the small <(p^⊥)²> region. Those features suggest our results may be a useful alternative in future experimental extractions.

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Research Organization:: Iowa State University, Ames, IA (United States)

Sponsoring Organization:: Chinese Academy of Sciences; Natural Science Foundation of Gansu Province, China; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-05CH11231; FG02-87ER40371; SC0018223

OSTI ID:: 2278936

Journal Information:: Physics Letters. B, Journal Name: Physics Letters. B Vol. 833; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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