期刊
PHYSICAL REVIEW D
卷 105, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.105.094018
关键词
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资金
- Institute of Modern Physics, Chinese Academy of Sciences [E129952YR0]
- Chinese Academy of Sciences Presidents International Fellowship Initiative [2021PM0023]
- Key Research Program of Frontier Sciences, Chinese Academy of Sciences [ZDB-SLY-7020]
- Natural Science Foundation of Gansu Province, China [20JR10RA067]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB34000000]
- Department of Energy [DE-FG02-87ER40371, DE-SC0018223]
- U.S. Department of Energy Office of Science User Facility [DE-AC02-05CH11231]
We study the generalized parton distributions (GPDs) for the valence quarks of the proton in both momentum space and position space using the basis light-front quantization (BLFQ) framework. By computing the GPDs from the eigenvectors of a light-front effective Hamiltonian, we obtain the spatial distributions of quark angular momentum inside the proton. The paper also explores various definitions of angular momentum density and discusses the flavor contributions to the quark angular momentum densities.
We study the unpolarized and the helicity-dependent generalized parton distributions (GPDs) for the valence quarks of the proton in both momentum space and position space within the basis light-front quantization (BLFQ) framework. The GPDs for the valence quarks are computed from the eigenvectors of a light-front effective Hamiltonian in the valence Fock sector consisting of a three-dimensional confinement potential and a one-gluon exchange interaction with fixed coupling. Employing these GPDs, we obtain the spatial distributions of quark angular momentum inside the proton. In our BLFQ approach, we explore various definitions of angular momentum density and illustrate the differences between them arising from terms that integrate to zero. We also discuss the flavor contributions to the quark angular momentum densities.
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