Search for light tetraquark states in and decays

, 崩壊における軽いテトラクォークの探索

Jia, S.*; 谷田聖 ; Belle Collaboration*; 他193名*

Jia, S.*; Tanida, Kiyoshi; Belle Collaboration*; 193 of others*

We search for the $J^{PC}=0^{--}$ and $1^{+-}$ light tetraquark states with masses up to 2.46~GeV/ in and decays with data samples of million and million events, respectively, collected with the Belle detector. No significant signals are observed in any of the studied production modes, and 90% credibility level (C.L.) upper limits on their branching fractions in and decays are obtained. The inclusive branching fractions of the and decays into final states with are measured to be ${cal B}(Upsilon(1S)to f_1(1285)+anything)=(46pm28({rm stat.})pm13({rm syst.}))times 10^{-4}$ and ${cal B}(Upsilon(2S)to f_1(1285)+anything)=(22pm15({rm stat.})pm6.3({rm syst.}))times 10^{-4}$ . The measured $chi_{b2} to J/psi + anything$ branching fraction is measured to be $(1.50pm0.34({rm stat.})pm0.22({rm syst.}))times 10^{-3}$ , and 90% C.L. upper limits for the $chi_{b0,b1} to J/psi + anything$ branching fractions are found to be $2.3times 10^{-3}$ and $1.1times 10^{-3}$ , respectively. For ${cal B}(chi_{b1} to omega + anything)$ , the branching fraction is measured to be $(4.9pm1.3({rm stat.})pm0.6({rm syst.}))times 10^{-2}$ . All results reported here are the first measurements for these modes.

使用言語	:	English
掲載資料名	:	Physical Review D
巻	:	96
号	:	11
ページ数	:	p.112002_1 - 112002_14
発行年月	:	2017/12
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キーワード	:	ハドロン分光

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PDF	:	AA2018-0579.pdf:1.79MB

論文URL	:	https://doi.org/10.1103/PhysRevD.96.112002
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受委託・共同研究相手機関	:	高エネルギー加速器研究機構

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登録番号 : AA20180579
抄録集掲載番号 : 47000422
論文投稿番号 : 21094

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