Disentangling the role of the Y(4260) in e(+)e(-) degrees -> D*D* and D-s*D-s* via line shape studies | |
Guo, FK; Xue, SR; Jing, HJ; Zhao, Q2,3,5 | |
刊名 | PHYSICS LETTERS B |
2018 | |
卷号 | 779页码:402-408 |
关键词 | TRIANGLE SINGULARITIES PENTAQUARK STATES |
ISSN号 | 0370-2693 |
DOI | 10.1016/j.physletb.2018.02.027 |
英文摘要 | Whether the Y(4260) can couple to open charm channels has been a crucial issue for understanding its nature. The available experimental data suggest that the cross section line shapes of exclusive processes in e(+)e(-) annihilations have nontrivial structures around the mass region of the Y(4260). As part of a series of studies of the Y(4260) as mainly a (D) over barD(1) (2420) + c.c. molecular state, we show that the partial widths of the Y(4260) to the two -body open charm channels of e(+)e(-) -> D* (D) over bar* and D-s*(D) over bar (s)* are much smaller than that to (D) over barD*pi+C.C.. The line shapes measured by the Belle Collaboration for these two channels can be well described by the vector charmonium states psi(4040), psi(4160) and psi(4415) together with the Y(4260). It turns out that the interference of the Y(4260) with the other charmonia produces a dip around 4.22 GeV in the e(+)e(-) -> D* (D) over bar* cross section line shape. The data also show an evidence for the strong coupling of the Y(4260) to the D (D) over bar (1)(2420), in line with the expectation in the hadronic molecular scenario for the Y(4260). (C) 2018 The Authors. Published by Elsevier B.V. |
学科主题 | Astronomy & Astrophysics ; Physics |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.itp.ac.cn/handle/311006/22927] |
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.Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat S, Changsha 410081, Hunan, Peoples R China 2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Guo, FK,Xue, SR,Jing, HJ,et al. Disentangling the role of the Y(4260) in e(+)e(-) degrees -> D*D* and D-s*D-s* via line shape studies[J]. PHYSICS LETTERS B,2018,779:402-408. |
APA | Guo, FK,Xue, SR,Jing, HJ,&Zhao, Q.(2018).Disentangling the role of the Y(4260) in e(+)e(-) degrees -> D*D* and D-s*D-s* via line shape studies.PHYSICS LETTERS B,779,402-408. |
MLA | Guo, FK,et al."Disentangling the role of the Y(4260) in e(+)e(-) degrees -> D*D* and D-s*D-s* via line shape studies".PHYSICS LETTERS B 779(2018):402-408. |
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