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
DOI10.1016/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
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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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