Observation of a vector charmoniumlike state in $e^+e^- to D^+_sD_{s1}(2536)^-+c.c.$

Jia, S.*; Tanida, Kiyoshi ; Belle Collaboration*; 172 of others*

Using a data sample of 921.9 fb $^{-1}$ collected with the Belle detector, we study the process of $e^+e^-to D^+_sD_{s1}(2536)^-+c.c.$ via initial-state radiation. We report the first observation of a vector charmoniumlike state decaying to $D^+_sD_{s1}(2536)^-+c.c.$ with a significance of 5.9, including the systematic uncertainties. The measured mass and width are $(4625.9^{+6.2}_{-6.0}({rm stat.})pm0.4({rm syst.}))~{rm MeV}/c^{2}$ and $(49.8^{+13.9}_{-11.5}({rm stat.})pm4.0({rm syst.}))~{rm MeV}$ , respectively. The product of the $e^+e^-to D^+_sD_{s1}(2536)^-+c.c.$ cross section and the branching fraction of $D_{s1}(2536)^-to{bar D}^{*0}K^-$ is measured from the $D_s bar{D}_{s1}(2536)$ threshold to 5.59 GeV.

Language	:	English
Journal	:	Physical Review D
Volume	:	100
Number	:	11
Pages	:	p.111103_1 - 111103_8
Publication Year/Month	:	2019/12
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Paper URL	:	https://doi.org/10.1103/PhysRevD.100.111103
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Keywords	:	ハドロン分光
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Article of JAEA R&D Review	:
Cooperating Institute	:	高エネルギー加速器研究機構

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Registration No. : AA20200188
JAEA Abstracts No. : 48000828
Paper Submission No. : 23105

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