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arXiv · 1212.3591

Exclusive decay of $\Upsilon$ into $J/\psi+\chi_{c0,1,2}$

Jia Xu·Hai-Rong Dong·Feng Feng·Ying-Jia Gao·Yu Jia
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Abstract

We study the $\Upsilon$ exclusive decay into double charmonium, specifically, the $S$-wave charmonium $ J/\psi$ plus the $P$-wave charmonium $\chi_{c0,1,2}$ in the NRQCD factorization framework. Three distinct decay mechanisms, i.e., the strong, electromagnetic and radiative decay channels are included and their interference effects are investigated. The decay processes $\Upsilon(1S,2S,3S)\to J/\psi+\chi_{c1,0}$ are predicted to have the branching fractions of order $10^{-6}$, which should be observed in the prospective Super $B$ factory.

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Jia Xu, Hai-Rong Dong, Feng Feng, Ying-Jia Gao, Yu Jia. 2012-12-14. Exclusive decay of $\Upsilon$ into $J/\psi+\chi_{c0,1,2}$. https://doi.org/10.1103/physrevd.87.094004

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