超越矢量介子主导地位的 X(3872)光生成：开粲耦合通道机制

IF 3.4 3区物理与天体物理 Q2 PHYSICS, NUCLEAR

Journal of Physics G: Nuclear and Particle Physics Pub Date : 2024-09-08 DOI:10.1088/1361-6471/ad6fbc

Xiong-Hui Cao, Meng-Lin Du and Feng-Kun Guo

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引用次数: 0

摘要

未来的电子-离子对撞机将寻找和研究隐蔽的奇异强子。例如，X(3872)可以通过γp → X(3872)p的排他性过程产生。在估算这类过程的截面时，通常采用矢量介子优势模型。然而，通过开谐介子-重子中间态的耦合信道产生机制可能起着至关重要的作用。为了评估这种贡献的重要性，我们假定耦合信道机制来估计γp → X(3872)p反应的截面。在能量接近阈值时，预测γp → X(3872)p的总截面为数十纳巴，这可以在未来的实验设施中测量到。此外，开粲耦合沟道机制导致了总截面的独特线形，可用于揭示产生动力学。

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Photoproduction of the X(3872) beyond vector meson dominance: the open-charm coupled-channel mechanism

Hidden-charm exotic hadrons will be searched for and investigated at future electron–ion colliders. For instance, the X(3872) can be produced through the exclusive process γp → X(3872)p. The vector meson dominance model has been commonly employed in estimating the cross sections of such processes. However, the coupled-channel production mechanism through open-charm meson-baryon intermediate states may play a crucial role. To assess the significance of such contributions, we estimate the cross section of the γp → X(3872)p reaction assuming the coupled-channel mechanism. For energies near the threshold, the total cross section is predicted to be of tens of nanobarns for γp → X(3872)p, which can be measured at future experimental facilities. Furthermore, the open-charm coupled-channel mechanism leads to a distinct line shape of the total cross section that can be utilized to reveal the production dynamics.

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来源期刊

Journal of Physics G: Nuclear and Particle Physics 物理-物理：核物理

CiteScore

7.60

自引率

5.70%

发文量

105

审稿时长

1 months

期刊介绍： Journal of Physics G: Nuclear and Particle Physics (JPhysG) publishes articles on theoretical and experimental topics in all areas of nuclear and particle physics, including nuclear and particle astrophysics. The journal welcomes submissions from any interface area between these fields. All aspects of fundamental nuclear physics research, including: nuclear forces and few-body systems; nuclear structure and nuclear reactions; rare decays and fundamental symmetries; hadronic physics, lattice QCD; heavy-ion physics; hot and dense matter, QCD phase diagram. All aspects of elementary particle physics research, including: high-energy particle physics; neutrino physics; phenomenology and theory; beyond standard model physics; electroweak interactions; fundamental symmetries. All aspects of nuclear and particle astrophysics including: nuclear physics of stars and stellar explosions; nucleosynthesis; nuclear equation of state; astrophysical neutrino physics; cosmic rays; dark matter. JPhysG publishes a variety of article types for the community. As well as high-quality research papers, this includes our prestigious topical review series, focus issues, and the rapid publication of letters.