Transverse structure of the proton beyond leading twist: A light-front Hamiltonian approach

Within the Basis Light-Front Quantization framework, we systematically investigate the subleading twist (twist-3) transverse-momentum-dependent parton distribution functions (TMDs) of the proton beyond the Wandzura-Wilczek (WW) approximation. The subleading twist TMDs are not independent and can be...

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Main Authors Zhu, Zhimin, Xu, Siqi, Wu, Jiatong, Yu, Hongyao, Hu, Zhi, Lan, Jiangshan, Mondal, Chandan, Zhao, Xingbo, Vary, James P, Collaboration, BLFQ
Format Journal Article
LanguageEnglish
Published 21.04.2024
Subjects
Physics - High Energy Physics - Phenomenology
Physics - High Energy Physics - Theory
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Summary:Within the Basis Light-Front Quantization framework, we systematically investigate the subleading twist (twist-3) transverse-momentum-dependent parton distribution functions (TMDs) of the proton beyond the Wandzura-Wilczek (WW) approximation. The subleading twist TMDs are not independent and can be decomposed into twist-2 and genuine twist-3 terms from the equations of motion. The latter involves quark-quark-gluon correlations and contains interferences between two light-front Fock sectors, $|qqq\rangle$ and $|qqqg\rangle$, which are usually neglected in the WW approximation.
DOI:10.48550/arxiv.2404.13720