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Search for the $$0^{--}$$ Glueball in $$Upsilon(1S)$$ and $$Upsilon(2S)$$ decays

$$Upsilon(1S)$$および$$Upsilon(2S)$$の崩壊における$$0^{--}$$グルーボールの探索

Jia, S.*; 谷田 聖   ; Belle Collaboration*; 他170名*

Jia, S.*; Tanida, Kiyoshi; Belle Collaboration*; 170 of others*

We report the first search for the $$J^{PC}=0^{--}$$ glueball in $$Upsilon(1S)$$ and $$Upsilon(2S)$$ decays with data samples of $$(102pm2)$$ million and $$(158pm4)$$ million events, respectively, collected with the Belle detector. No significant signals are observed in any of the proposed production modes, and the 90% credibility level upper limits on their branching fractions in $$Upsilon(1S)$$ and $$Upsilon(2S)$$ decays are obtained. The inclusive branching fractions of the $$Upsilon(1S)$$ and $$Upsilon(2S)$$ decays into final states with a $$chi_{c1}$$ are measured to be $$B(Upsilon(1S) to chi_{c1} + {rm anything} = (1.90 pm 0.43 ({rm stat.}) pm 0.14 ({rm syst.})) times 10^{-4}$$ with an improved precision over prior measurements and $$B(Upsilon(2S) to chi_{c1} + {rm anything} = (2.24 pm 0.44 ({rm stat.}) pm 0.20 ({rm syst.})) times 10^{-4}$$ for the first time.

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パーセンタイル:68.68

分野:Astronomy & Astrophysics

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