Work

Light cone distributions of $P$-wave quarkonia

Year: 2026

Type: preprint

Abstract: Motivated by renewed interest in the light-cone distributions of $P$-wave quarkonia, we investigate the leading-twist distribution amplitudes of these states within the basis light-front quantization (BLFQ) formalism. While our extracted distributions exhibit macroscopic shapes consistent with expectations from the non-relativistic limit, we find that relativistic effects introduce critical structural features. Most notably, we observe novel ``W"-shaped structures in the distribution amplitudes of the axial vector mesons, which arise from relativistically induced $S/D$ partial waves and cannot be explained by non-relativistic dynamics. These findings provide essential non-perturbative inputs for analyzing hard exclusive processes and highlight the importance of relativistic frameworks for understanding heavy quarkonium production and structure at modern high-energy colliders.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2609.08393

Authors: Li, Yang, Hu, Tianyang, Cao, Xianghui, Li, Meijian

Institutions: University of Science and Technology of China, Chinese Academy of Sciences, Institute of Modern Physics, University of Chinese Academy of Sciences, Huazhong University of Science and Technology

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Chinese Academy of Sciences, Huazhong University of Science and Technology

Award: G328816031

OpenAlex ID: W7212077578

Cites: 79

Cited by: 1

Related to: 10