Evidence for a vector charmoniumlike state in $e^+e^- to D^+_sD^*_{s2}(2573)^-+c.c.$

Jia, S.*; Tanida, Kiyoshi ; Belle Collaboration*; 175 of others*

We report the measurement of $e^+e^- to D^+_sD^*_{s2}(2573)^-+c.c.$ via initial-state radiation using a data sample of an integrated luminosity of 921.9 fb $^{-1}$ collected with the Belle detector at the and nearby. We find evidence for an enhancement with a 3.4 significance in the invariant mass of $D^+_sD^*_{s2}(2573)^- +c.c.$ The measured mass and width are $(4619.8^{+8.9}_{-8.0}({rm stat.})pm2.3({rm syst.}))~{rm MeV}/c^{2}$ and $(47.0^{+31.3}_{-14.8}({rm stat.})pm4.6({rm syst.}))~{rm MeV}$ , respectively. The mass, width, and quantum numbers of this enhancement are consistent with the charmonium-like state at 4626 MeV/ recently reported by Belle in $e^+e^-to D^+_sD_{s1}(2536)^-+c.c.$ The product of the $e^+e^-to D^+_sD^*_{s2}(2573)^-+c.c.$ cross section and the branching fraction of $D^*_{s2}(2573)^-to{bar D}^0K^-$ is measured from $D^+_sD^*_{s2}(2573)^-$ threshold to 5.6 GeV.

Language	:	English
Journal	:	Physical Review D
Volume	:	101
Number	:	9
Pages	:	p.091101_1 - 091101_8
Publication Year/Month	:	2020/05
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Paper URL	:	https://doi.org/10.1103/PhysRevD.101.091101
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Keywords	:	ハドロン分光
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Cooperating Institute	:	高エネルギー加速器研究機構

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Registration No. : AA20200296
JAEA Abstracts No. : 48000968
Paper Submission No. : 23236

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