Coupled-channel approach to T-cc(+) including three-body effects
文献类型：期刊论文
| 作者 | Du, Meng-Lin; Baru, Vadim4,5; Dong, Xiang-Kun; Filin, Arseniy4; Guo, Feng-Kun ; Hanhart, Christoph8,9; Nefediev, Alexey10,11; Nieves, Juan; Wang, Qian1,3,12
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| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2022 |
| 卷号 | 105期号:1页码:14024 |
| ISSN号 | 2470-0010 |
| 关键词 | HEAVY TETRAQUARK STATES X(3872) STABILITY SYMMETRY DEUTERON HIDDEN |
| DOI | 10.1103/PhysRevD.105.014024 |
| 英文摘要 | A coupled-channel approach is applied to the charged tetraquark state T-cc(+). recently discovered by the LHCb Collaboration. The parameters of the interaction are fixed by a fit to the observed line shape in the three-body (DD0)-D-0 pi(+) channel. Special attention is paid to the three-body dynamics in the T-cc(+) due to the finite life time of the D*. An approach to the T-cc(+) is argued to be self-consistent only if both manifestations of the three-body dynamics, the pion exchange between the D and D* mesons and the finite D* width, are taken into account simultaneously to ensure that three-body unitarity is preserved. This is especially important to precisely extract the pole position in the complex energy plane whose imaginary part is very sensitive to the details of the coupled-channel scheme employed. The (DD0)-D-0 and (DD+)-D-0 invariant mass distributions, predicted based on this analysis, are in good agreement with the LHCb data. The low-energy expansion of the D* D scattering amplitude is performed and the low-energy constants (the scattering length and effective range) are extracted. The compositeness parameter of the T-cc(+) is found to be close to unity, which implies that the T-cc(+) is a hadronic molecule generated by the interactions in the D*D-+(0) and D*D-0(+) channels. Employing heavy-quark spin symmetry, an isoscalar D* D* molecular partner of the T-cc(+) with J(P) = 1(+) is predicted under the assumption that the DD* -D* D* coupled-channel effects can be neglected. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27719]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.Moscow Inst Phys & Technol, Inst Sky Lane 9, Dolgoprudnyi, Moscow Region, Russia 2.South China Normal Univ, Southern Nucl Sci Comp Ctr, Guangdong Hong Kong Joint Lab Quantum Matter, Guangzhou 510006, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 4.Ctr Mixto CSIC UV, Inst Fis Corpuscular, Inst Invest Paterna, Apartado 22085, Valencia 46071, Spain 5.Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany 6.Kurchatov Inst, Inst Theoret & Expt Phys NRC, Moscow 117218, Russia 7.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 8.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 9.Forschungszentrum Julich, Inst Adv Simulat, Inst Kernphys, D-52425 Julich, Germany 10.Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany |
| 推荐引用方式 GB/T 7714 | Du, Meng-Lin,Baru, Vadim,Dong, Xiang-Kun,et al. Coupled-channel approach to T-cc(+) including three-body effects[J]. PHYSICAL REVIEW D,2022,105(1):14024. |
| APA | Du, Meng-Lin.,Baru, Vadim.,Dong, Xiang-Kun.,Filin, Arseniy.,Guo, Feng-Kun.,...&Wang, Qian.(2022).Coupled-channel approach to T-cc(+) including three-body effects.PHYSICAL REVIEW D,105(1),14024. |
| MLA | Du, Meng-Lin,et al."Coupled-channel approach to T-cc(+) including three-body effects".PHYSICAL REVIEW D 105.1(2022):14024. |
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来源：理论物理研究所
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