Disentangling the role of the Y(4260) in e(+)e(-) degrees -> D*D* and D-s*D-s* via line shape studies

doi:10.1016/j.physletb.2018.02.027

ITP OpenIR > SCI期刊论文

	Xue, SR ; Jing, HJ ; Guo, FK; Zhao, Q 1,3,4
	*Disentangling the role of the Y(4260) in e(+)e(-) degrees -> DD* and D-sD-s via line shape studies**
Source Publication	PHYSICS LETTERS B
Language	英语
Keyword	TRIANGLE SINGULARITIES PENTAQUARK STATES
Abstract	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 barDpi+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.
	2018
ISSN	0370-2693
Volume	779 Pages:402-408
Subject Area	Astronomy & Astrophysics ; Physics
MOST Discipline Catalogue	Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields
DOI	10.1016/j.physletb.2018.02.027
Indexed By	SCIE
Citation statistics	Cited Times:11[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.itp.ac.cn/handle/311006/22927
Collection	SCI期刊论文
Affiliation	1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 5.Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat S, Changsha 410081, Hunan, Peoples R China
Recommended Citation GB/T 7714	Xue, SR,Jing, HJ,Guo, FK,et al. Disentangling the role of the Y(4260) in e(+)e(-) degrees -> DD and D-sD-s via line shape studies[J]. PHYSICS LETTERS B,2018,779:402-408.
APA	Xue, SR,Jing, HJ,Guo, FK,&Zhao, Q.(2018).Disentangling the role of the Y(4260) in e(+)e(-) degrees -> DD and D-sD-s via line shape studies.PHYSICS LETTERS B,779,402-408.
MLA	Xue, SR,et al."Disentangling the role of the Y(4260) in e(+)e(-) degrees -> DD and D-sD-s via line shape studies".PHYSICS LETTERS B 779(2018):402-408.

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