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

	*Disentangling the role of the Y(4260) in e(+)e(-) degrees -> DD* and D-sD-s via line shape studies**
	Xue, SR; Jing, HJ; Zhao Q(赵强); Guo, FK; Zhao, Q; Xue SR(薛思润)
刊名	PHYSICS LETTERS B
	2018
卷号	779 页码:402-408
ISSN号	0370-2693
DOI	10.1016/j.physletb.2018.02.027
文献子类	Article
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 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.
电子版国际标准刊号	1873-2445
WOS关键词	TRIANGLE SINGULARITIES ; PENTAQUARK ; STATES
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000429098900049
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285839]
专题	高能物理研究所_理论物理室
通讯作者	Zhao Q(赵强)
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Xue, SR,Jing, HJ,Zhao Q,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,赵强,Guo, FK,Zhao, Q,&薛思润.(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.