Search for a doubly charged bound state in inclusive decays and via direct production in collisions at = 10.520, 10.580, and 10.867 GeV

Li, Y.*; Tanida, Kiyoshi ; Belle Collaboration*; 205 of others*

We report the results of a first search for a doubly-charged bound state, denoted the $R^{++}$ , in and inclusive decays and via direct production in collisions at = 10.520, 10.580, and 10.867 GeV. The search uses data accumulated with the Belle detector at the KEKB asymmetric-energy collider. No significant signals are observed in the $D^{+}D_{s}^{*+}$ invariant-mass spectra of all studied modes. The 90% credibility level upper limits on their product branching fractions in and inclusive decays ( ${cal B}(Upsilon(1S,2S) to R^{++} + {rm anything}) times {cal B}(R^{++} to D^{+} D_{s}^{*+})$ ), and the product values of Born cross section and branching fraction in collisions ( $sigma(e^+e^- to R^{++} + {rm anything}) times {cal B}(R^{++} to D^{+} D_{s}^{*+})$ ) at = 10.520, 10.580, and 10.867 GeV under different assumptions of $R^{++}$ masses varying from 4.13 to 4.17 GeV/, and widths varying from 0 to 5 MeV are obtained.

Language	:	English
Journal	:	Physical Review D
Volume	:	102
Number	:	11
Pages	:	p.112001_1 - 112001_14
Publication Year/Month	:	2020/12
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Paper URL	:	https://doi.org/10.1103/PhysRevD.102.112001
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Keywords	:	Hadron spectroscopy
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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. : AA20210363
JAEA Abstracts No. : 50000394
Paper Submission No. : 25145

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